Category Archives: Ebay

Finding… RAPT Pill Digital Hydrometer from Kegland

rapt pillThe RAPT Pill allows accurate and precise, true real-time specific gravity and temperature logging and control via wifi/bluetooth integration with the RAPT fermentation chamber (KL15813), RAPT mobile app or RAPT IOT.

The RAPT Pill acts as both a real-time gravity testing hydrometer and thermometer allowing instant gravity and temperature measurements and also logging from inside your fermenter during fermentation.

The RAPT Pill boasts many advantages over other wireless hydrometers and thermometers including tough design, better ergonomics, sanitary design and less susceptible to error as a result of hops, krausen or CO2 bubbles generated from fermentation.

The iSpindel is a DIY Wi-Fi enabled hydrometer.  The project originated in Germany, but an English translation is available.


This integrates directly with RAPT fermentation Chamber and can also work independently via RAPT mobile app or RAPT IOT. 

Finding RAPT Pill:

Availability of RAPT Pill in the US has been scant. eBay has been the only place I’ve been able to find them.

Search eBay for RAPT Pill for additional options

Also…

Continue reading

Brand New Replacement Ball Lock Corny Keg Lids – for ball & pin lock kegs – $18 + free shipping

Cornelius Keg Lid (New) - Lid for Corny Keg - Homebrew Beer Wine Cold Brew

Replacement Corny Keg Lid

More Info

From the product description, check product page for current description, price and availability:

We love these keg lids as either a replacement or an upgrade to the stock lid featured on many homebrew kegs. Most homebrew kegs feature a straight, parallel bale that sits extemely close to the lid when in the closed position. So close that it can be hard to get a finger or two under the bale to open it. The arms on this lid bend outward creating a nice, easy-to-grip handle to open and close the bale.

For use with Torpedo, Cornelius, and Firestone kegs. Comes with a pull-ring pressure relief valve and o-ring. PRV rated to 85 psi.

We also have keg washing tablets and much more. Feel free to send a message if you need anything else or have any questions. Cheers!


 

  • Manual vs Automatic PRV:  “Automatic PRV: sounds better than “Manual PRV”, but in my opinion, the opposite is true.  Both styles, generally, automatically vent at a set pressure for safety reasons.  Manual PRVs at the ability to…. manually activate the PRV.  That allows you to easily vent your keg as needed.  A tool is required to vent lids without manual PRV valves.
  • Works with both pin and ball lock kegs: In most cases, Pin lock and ball lock cornelius style keg lids are interchangeable from a size perspective.  That means you can, generally speaking, put a pepsi/ball lock style (manual prv) lid on a coke/pin lock style (no manual prv) keg.
  • An upgrade to pin lock style lids: In my book, that’s a solid upgrade.  See: What’s the Difference Between Ball Lock Kegs and Pin Lock Kegs?

As if this posting, this is eBay offering is selling for just $18. Shipping is also free to many US addresses.

Cornelius Keg Lid (New) – Lid for Corny Keg – Homebrew Beer Wine Cold Brew

Listings change regularly… Search cornelius keg lids on eBay – for current offerings

Also: Kegerator Tips & Gear | Keg Repair Part #s | Recent Keg Finds

Our Top Draft Resources

Price, promotions and availability can change quickly. Check the product page for current price, description and availability tag:updtd rp:ebaykeglids

(6) Packs of Safale S-04 English Yeast – $17.95 – $2.99 Each + Free Shipping

6 PACK S-04 SAFALE DRY ENGLISH ALE BEER MAKING KIT YEAST HOME BREWING MR S04

6 packs of Safale S-04 dry yeast

As if this posting, this is eBay offering is selling for just $17.95.  Shipping is also free to many US addresses.

6 PACK S-04 SAFALE DRY ENGLISH ALE BEER MAKING KIT YEAST HOME BREWING MR S04

Also Consider:

SIX x Safale s-04 English Yeast

More Fermentation Related!

Price, promotions and availability can change quickly. Check the product page for current price, description and availability. rpu:ebayus04

6 Packs of Safale US-05 Yeast – $17.95 – $2.99 Each + Free Shipping

s-l1600

(6) 11.5 gram packs of Safale US-05.  Safale US-05 is the Chico Ale Strain similar to Wyeast 1056 and White Labs WLP001.

  • As if this posting, this is eBay offering is selling for just $17.95
  • Shipping is also free to many US addresses.
  • If this offering is sold out, search the seller’s other items to see if it’s been re-listed.

BEER-YEAST-US-05-6-PACK-FERMENTIS-SAFALE-DRY-ALE-FOR-HOME-BREWING-YEAST-HOMEBREW

Safale US-05 Yeast Deals!

More Fermentation Related!

Price, promotions and availability can change quickly. Check the product page for current price, description and availability tag:updtd rp:ebayus05

Back in Stock… RAPT Pill Digital Hydrometers from Kegland

rapt pillThe RAPT Pill allows accurate and precise, true real-time specific gravity and temperature logging and control via wifi/bluetooth integration with the RAPT fermentation chamber (KL15813), RAPT mobile app or RAPT IOT.

The RAPT Pill acts as both a real-time gravity testing hydrometer and thermometer allowing instant gravity and temperature measurements and also logging from inside your fermenter during fermentation.

The RAPT Pill boasts many advantages over other wireless hydrometers and thermometers including tough design, better ergonomics, sanitary design and less susceptible to error as a result of hops, krausen or CO2 bubbles generated from fermentation.

The iSpindel is a DIY Wi-Fi enabled hydrometer.  The project originated in Germany, but an English translation is available.


This integrates directly with RAPT fermentation Chamber and can also work independently via RAPT mobile app or RAPT IOT. 

Limited Time Deals:

Back in stock… Both of these offerings have been sold out for some time. As of this update, both are showing avaiability.

On 2….

As of this posting, it doesn’t look like this is available in the US. From what I’m hearing, that will probably remain the case. I’m guessing RAPT pill will not be distributed in the US.

As of this posting, this eBay seller is selling two packs of for about $112 with about $19 in shipping charges. That figures to about $66.50 each shipped.

2 RAPT Pill Digital Hydrometers (Kegland) w/ additional O-Rings and colored cap

On 1…

As of this posting, this eBay seller is the RAPT Pill for about $56 with about $11 in shipping charges.

RAPT Pill Digital Hydrometer (Kegland) w/ additional O-Ring

Search eBay for RAPT Pill for additional options

Also…

Continue reading

Reader Tip: Wall Mount Stainless Steel Drip Tray – $39.99 + free shipping

Thanks to HBF Reader Dean for this tip!  Let’s be friends!  8 Ways to Connect with HBF

12" Stainless Steel Hanging Drip Tray For Kegerator or Keezer Removable Grate

12″ Stainless Steel Hanging Drip Tray For Kegerator or Keezer Removable Grate

  • Pre-drilled keyholes for easy mounting.
  • 12″ Wide. Perfect for up to 2-4 taps!
  • Durable Stainless Steel construction
  • 12″ Wide X 6″ Tall X 7″ Deep

As if this posting, this is eBay offering is selling for just $39.99. Shipping is also free to many US addresses.

12″ Stainless Steel Hanging Drip Tray For Kegerator or Keezer Removable Grate

Also: Kegerator Tips & Gear | Keg Repair Part #s | Recent Keg Finds

Our Top Draft Resources

Price, promotions and availability can change quickly. Check the product page for current price, description and availability.

Hands on Review: iSpindel Digital WiFi Hydrometer!

ISPINDLE REVIEW

Thank you to HBF Contributor Aaron N for this hands on review!  Aaron is an advanced brewer, long time reader and a serial tipster!

iSpindel

Having the ability to precisely control fermentation temperatures was the change to my brewing setup I credit with one of the largest improvements in my finished beer quality. Being able to dial in specific temperatures for lagers, perform diacetyl rests for both ales and lagers, and cold crash a finished beer helped me to better control what was happening inside my fermenter. One of the data inputs that informed when to change the fermenter temperature was the gravity of the fermenting wort. At various times through the fermentation, I would test a sample to know where the wort was on its journey to become beer. Taking multiple samples was time consuming and it resulted in a loss, albeit a small loss, of the finished product due to the number of samples I was taking.

Enter the electronic, submersible hydrometer – a tool that can read out not only the gravity of a fermenting liquid, but also its temperature all from inside the fermenter, relieving the need to take numerous samples throughout the fermentation process. In addition, many of these devices could connect to an external source and log the data for the user to read in real-time. The brewer and technologist in me were both excited to see what one of these tools had to offer.

The iSpindel is one of a few offerings to homebrewers today in the category of an electronic, submersible hydrometer which also include the Tilt and Float products (I do have experience with the Tilt, which I will discuss later, but will focus on the iSpindel primarily in this review). All products rely on a sensor that can measure the angle of the device in order to calculate the gravity of the liquid. The iSpindel was born out of a desire to make a more cost-effective version of an electronic tilt measurement-based hydrometer, according to the creator, as the other offerings on the market are typically above the $100 mark.

I purchased my iSpindel on eBay from a seller in Canada for roughly half the price of the other devices available:

https://www.ebay.com/usr/wilbrod45


Also:


Continue reading

Hands on Review: iSpindel Digital WiFi Hydrometer!

ISPINDLE REVIEW

Thank you to HBF Contributor Aaron Nord for this hands on review!  Aaron is an advanced award winning brewer, a long time reader and a serial tipster!

iSpindel

Having the ability to precisely control fermentation temperatures was the change to my brewing setup I credit with one of the largest improvements in my finished beer quality. Being able to dial in specific temperatures for lagers, perform diacetyl rests for both ales and lagers, and cold crash a finished beer helped me to better control what was happening inside my fermenter. One of the data inputs that informed when to change the fermenter temperature was the gravity of the fermenting wort. At various times through the fermentation, I would test a sample to know where the wort was on its journey to become beer. Taking multiple samples was time consuming and it resulted in a loss, albeit a small loss, of the finished product due to the number of samples I was taking.

Enter the electronic, submersible hydrometer – a tool that can read out not only the gravity of a fermenting liquid, but also its temperature all from inside the fermenter, relieving the need to take numerous samples throughout the fermentation process. In addition, many of these devices could connect to an external source and log the data for the user to read in real-time. The brewer and technologist in me were both excited to see what one of these tools had to offer.

The iSpindel is one of a few offerings to homebrewers today in the category of an electronic, submersible hydrometer which also include the Tilt and Float products (I do have experience with the Tilt, which I will discuss later, but will focus on the iSpindel primarily in this review). All products rely on a sensor that can measure the angle of the device in order to calculate the gravity of the liquid. The iSpindel was born out of a desire to make a more cost-effective version of an electronic tilt measurement-based hydrometer, according to the creator, as the other offerings on the market are typically above the $100 mark.

I purchased my iSpindel on eBay from a seller in Canada for roughly half the price of the other devices available:

https://www.ebay.com/usr/wilbrod45


Also:


Continue reading

Floating Dip Tubes – $10.65 + free shipping

Stainless Steel Float with 60CM Silicone Dip Tube Replacement_Kit for Fermenter

Stainless Steel Float with 60CM Silicone Dip Tube Replacement_Kit for Fermenter

More Info

From the product description, check product page for current description, price and availability:

Stainless steel float with 60cm silicone dip tube replacement kit for conical and all rounder fermenter or keg.
The float is made of stainless steel material, rust and corrosion resistant. Silicone dip tube is safe and reliable to use.
The package includes a ball float and 60cm silicone dip tube, perfect replacement to replace your old or damage one.
You can cut the dip tube shorter to get the fitting size. The kit allows you to draw from the clearest beer at the top of the tank.
The kit can connect your faucet, sampling valve or other devices. Please confirm the size carefully before placing an order.


 

As if this posting, this is eBay offering is selling for just $10.65. Shipping is also free to many US addresses.

 

Stainless Steel Float with 60CM Silicone Dip Tube Replacement_Kit for Fermenter

My explanation of how these works…

When we carbonate a keg, pressure is being applied to the keg from the top, via the head space. Beer at the top carbonates first. That carbonation works it’s way down the keg. I’m sure there’s also some movement in the keg that helps to mix things up and distribute carbonation. But just sitting there, I think that mixing is a slow process. However it all works, practically speaking, the beer at the top carbonates more quickly compared to the beer at the bottom. This allows you to serve from the top accessing the more carbonated portion of the keg. It’s also a benefit for clarity because trub settles out heading downward. You can see this stratification in a glass carboy. As the beer starts to clear, the top clears first. I don’t think if this is exactly accurate, but I picture carbonation happening with the same sort of stratification until the beer reaches equilibrium and is equally carbonated throughout.

Homebrew Reviews: Fermentation

Price, promotions and availability can change quickly. Check the product page for current price, description and availability.

Announcing: RAPT Pill Digital Hydrometer from Kegland

rapt pillThe RAPT Pill allows accurate and precise, true real-time specific gravity and temperature logging and control via wifi/bluetooth integration with the RAPT fermentation chamber (KL15813), RAPT mobile app or RAPT IOT.

The RAPT Pill acts as both a real-time gravity testing hydrometer and thermometer allowing instant gravity and temperature measurements and also logging from inside your fermenter during fermentation.

The RAPT Pill boasts many advantages over other wireless hydrometers and thermometers including tough design, better ergonomics, sanitary design and less susceptible to error as a result of hops, krausen or CO2 bubbles generated from fermentation.

The iSpindel is a DIY Wi-Fi enabled hydrometer.  The project originated in Germany, but an English translation is available.


This integrates directly with RAPT fermentation Chamber and can also work independently via RAPT mobile app or RAPT IOT. 

Finding RAPT Pill:

Availability of RAPT Pill in the US has been scant. eBay has been the only place I’ve been able to find them.

Search eBay for RAPT Pill for additional options

Also…

Continue reading

Wrap Around Fermentation Heater… $14.99 + free shipping!

Fermenter Heater Wrap Around Heater 110V/32W

Fermenter Heater Wrap Around Heater 110V/32W

More Info

From the product description, check product page for current description, price and availability:

Heat Wrap covers a wide area of your carboy or fermentation vessel, promoting an even heat distribution. Using tape to adhere, it can be attached directly to your fermenter. You can increase the temperature of your ferment from 5-20 degrees Fahrenheit. To decrease the temperature differential, stick only a portion of the FermWrap to the fermenter. 32 watts of heat spread over almost two square feet, it provides gentle even heating.


 

As if this posting, this is eBay offering is selling for just $14.99. Shipping is also free to many US addresses.

Fermenter Heater Wrap Around Heater 110V/32W

Check sale or product page for current availability & pricing

Alternate Use Tip

I use a similar heat mat to help remove stubborn keg labels.  See: Removing Keg Labels… A Trick That Makes it Easy! – a section of our keg rebuild how-to

Related: Maintaining Fermentation Temps in Colder Weather

Inkbird ITC-308 Digital Temperature Controller| Review

Price, promotions and availability can change quickly. Check the product page for current price, description and availability.

Igloo Picnic Basket Style 25qt Cooler… $17.49 + What I Paid

Igloo Picnic Basket 25qt Cooler

  • Retro body style and colors inspired by the original 1990’s version
  • Refreshing mint color
  • Original 25 quart design
  • Full-sized chest with one handed carrying convenience
  • Durable, impact-resistant extended life hinges
  • Molded-in side handles for comfortable carrying

No need to dig in the garage to steal your parent’s cooler! Grab your own new colorful take on the classic throwback, the Igloo Picnic Basket in Yellow. Whether you want to take your cooler to the beach, park, sportsfield or simply in your backyard for a picnic, you will have the ease of carrying it with one hand while not compromising on space for all of your favorite snacks, drinks and goodies. This is a cooler that never needs to sit on a shelf!


As of this posting, this is on sale for $24.99. Add it to your cart and it drops to $17.49. Shipping is also free to many US addresses.

Check sale or product page for current availability & pricing

I bought this last time I featured it on Homebrew Finds at $20.39 which I consider a bargain. I haven’t used it yet but it’s a really… cool (did you see what I did there) cooler in a great size. Definitely a cooler as a cooler sort of thing, I don’t see it being used for a mash tun, but super neat to carry your homebrew and other stuff around in, especially at this price.

Igloo Picnic Basket 25qt Cooler – Yellow


Price, promotions and availability can change quickly. Check the product page for current price, description and availability.

Wrap Around Fermentation Heater… $14.99 + free shipping & Alternate Use Idea

Fermenter Heater Wrap Around Heater 110V/32W

Fermenter Heater Wrap Around Heater 110V/32W

More Info

From the product description, check product page for current description, price and availability:

Heat Wrap covers a wide area of your carboy or fermentation vessel, promoting an even heat distribution. Using tape to adhere, it can be attached directly to your fermenter. You can increase the temperature of your ferment from 5-20 degrees Fahrenheit. To decrease the temperature differential, stick only a portion of the FermWrap to the fermenter. 32 watts of heat spread over almost two square feet, it provides gentle even heating.


 

As if this posting, this is eBay offering is selling for just $14.99. Shipping is also free to many US addresses.

Fermenter Heater Wrap Around Heater 110V/32W

Alternate Use Tip

I use a similar heat mat to help remove stubborn keg labels.  See: Removing Keg Labels… A Trick That Makes it Easy! – a section of our keg rebuild how-to

Related: Maintaining Fermentation Temps in Colder Weather

Inkbird ITC-308 Digital Temperature Controller| Review

304 Stainless Steel Keg Dip Tube Hop Filter Screen – $8.89 + Free Shipping

Stainless Steel Homebrew Hop Screen - Dip Tube, Racking Cane Hop Filter

Stainless Steel Homebrew Hop Screen – Dip Tube, Racking Cane Hop Filter

More Info

From the product description, check product page for current description, price and availability:

from the description: “The Pure Screen Is a Welded Stainless Steel Screen That Slips Onto Your Keg Dip Tube And Filters Out Fruit Or Hop Particles. Works better with whole hops, but its main use it to keep loose particles out of the dip tube and poppet that may have been transferred when racking.”


 

Use with keg dip tube or racking cane.

As if this posting, this is eBay offering is selling for just $8.89.  Shipping is also free to select addresses.

Stainless Steel Homebrew Hop Screen – Dip Tube, Racking Cane Hop Filter

Price, promotions and availability can change quickly. Check the product page for current price, description and availability. rp:ebaydiptubescreen

Igloo Picnic Basket Style 25qt Cooler – $20.39 w/40% off promo

Igloo Picnic Basket 25qt Cooler

  • Retro body style and colors inspired by the original 1990’s version
  • Refreshing mint color
  • Original 25 quart design
  • Full-sized chest with one handed carrying convenience
  • Durable, impact-resistant extended life hinges
  • Molded-in side handles for comfortable carrying

No need to dig in the garage to steal your parent’s cooler! Grab your own new colorful take on the classic throwback, the Igloo Picnic Basket in Yellow. Whether you want to take your cooler to the beach, park, sportsfield or simply in your backyard for a picnic, you will have the ease of carrying it with one hand while not compromising on space for all of your favorite snacks, drinks and goodies. This is a cooler that never needs to sit on a shelf!


As of this posting, this is on sale for $33.99. eBay is discounting select items by an extra 40%. Add it to your cart and it will drop to just $20.39 while the deal and supplies last. Shipping is also free to many US addresses.

Igloo Picnic Basket 25qt Cooler – Yellow

Check sale or product page for current availability & pricing


Price, promotions and availability can change quickly. Check the product page for current price, description and availability.

304 Stainless Steel Keg Dip Tube Hop Filter Screen – $8.89 + Free Shipping

Stainless Steel Homebrew Hop Screen - Dip Tube, Racking Cane Hop Filter

Stainless Steel Homebrew Hop Screen – Dip Tube, Racking Cane Hop Filter

More Info

From the product description, check product page for current description, price and availability:

from the description: “The Pure Screen Is a Welded Stainless Steel Screen That Slips Onto Your Keg Dip Tube And Filters Out Fruit Or Hop Particles. Works better with whole hops, but its main use it to keep loose particles out of the dip tube and poppet that may have been transferred when racking.”


 

Use with keg dip tube or racking cane.

As if this posting, this is eBay offering is selling for just $8.89.  Shipping is also free to select addresses.

Stainless Steel Homebrew Hop Screen – Dip Tube, Racking Cane Hop Filter

Price, promotions and availability can change quickly. Check the product page for current price, description and availability. rp:ebaydiptubescreen

Kegland DuoTight Ball Lock Disconnects w/Flow Control available via eBay

KL21418 Ball Lock Disconnect Corny Keg Connector Liquid Pushfit 8mm

Kegland’s DuoTight Fittings are designed to work with EVABarrier Double Wall Tubing.  They offer quick, reliable connections, easy implementation, a variety of fitting options and feature amazing versatility.  They’re also, generally speaking, very well priced.  DuoTights are push to connect fittings and require no tubing clamps.

DuoTights are… awesome.  Check out my extensive Hands on Review

When DuoTights first came out, the solution for connecting kegs to EVABarrier was using an MFL QD + DuoTight Flare fitting. That worked just fine and is still the only option available to pin lock keg users.

A while back native DuoTight Ball Lock QDs were introduced. Those are outstanding. Check out My Review

I’m excited to announce another Kegland innovation.  DuoTight Ball Lock QDs + Flow Control!

These will allow DuoTight and EVABarrier users to easily dial in resistance without long lengths of tubing.

As of this posting, I’m only seeing these available for international sellers on eBay. Hoping they will make it stateside in the near future.

Related: What Does a Flow Control Faucet Do?Step by Step Balancing Your Kegerator Draft System

Buy DuoTight

DuoTight Ball Lock QDs!

duotight ball lock quick disconnect review

Related DuoTight Reviews on How-To’s!

DuoTight Reviews, Resource Posts & How-To’s!

DuoTights are so amazing – at least in my book 🙂 – that I have several reviews and related top posts

I Recommend These for DuoTight Fittings!

My DuoTight Review!

Price, promotions and availability can change quickly. Check the product page for current price, description and availability. tag: ntrd

iSpindel Digital WiFi Hydrometer – Pre-Built or DIY iSpindel & Compare w/TILT

iSpindel WiFi Hydrometer - Samsung Battery *FREE WORLDWIDE delivery*

The iSpindel is a DIY Wi-Fi enabled hydrometer.  The project originated in Germany, but an English translation is available.

Build Your Own iSpindel

iSpindel Documentation

Pre-Built iSpindel

As mentioned previously. the iSpindel is a DIY build.  However, it seems that some people are building these and selling them on eBay.  The pictured iSpindel is one such option.

iSpindel WiFi Hydrometer << This shows all seller’s items in case this ends and is re-listed

If that offering has sold out or is otherwise, unavailable… search eBay for iSpindel

Compare iSpindel to TILT

TILT Hands on Review!

tilt review

More Homebrew Finds!

Recent Deals!

10 Most Recent Homebrew Resource Posts & How-To’s!

We are Homebrew Review HQ!  Our 10 Most Recent Reviews

Homebrew Reviews: Fermentation

Price, promotions and availability can change quickly. Check the product page for current price, description and availability. top:spindel tag:tpru

Wrap Around Fermentation Heater… $14.99 + free shipping & Alternate Use Idea

Fermenter Heater Wrap Around Heater 110V/32W

Fermenter Heater Wrap Around Heater 110V/32W

More Info

From the product description, check product page for current description, price and availability:

Heat Wrap covers a wide area of your carboy or fermentation vessel, promoting an even heat distribution. Using tape to adhere, it can be attached directly to your fermenter. You can increase the temperature of your ferment from 5-20 degrees Fahrenheit. To decrease the temperature differential, stick only a portion of the FermWrap to the fermenter. 32 watts of heat spread over almost two square feet, it provides gentle even heating.


 

As if this posting, this is eBay offering is selling for just $14.99. Shipping is also free to many US addresses.

Fermenter Heater Wrap Around Heater 110V/32W

Alternate Use Tip

I use a similar heat mat to help remove stubborn keg labels.  See: Removing Keg Labels… A Trick That Makes it Easy! – a section of our keg rebuild how-to

Related: Maintaining Fermentation Temps in Colder Weather

Inkbird ITC-308 Digital Temperature Controller| Review

Wrap Around Fermentation Heater… $14.99 + free shipping & Alternate Use Idea

Fermenter Heater Wrap Around Heater 110V/32W

Fermenter Heater Wrap Around Heater 110V/32W

More Info

From the product description, check product page for current description, price and availability:

Heat Wrap covers a wide area of your carboy or fermentation vessel, promoting an even heat distribution. Using tape to adhere, it can be attached directly to your fermenter. You can increase the temperature of your ferment from 5-20 degrees Fahrenheit. To decrease the temperature differential, stick only a portion of the FermWrap to the fermenter. 32 watts of heat spread over almost two square feet, it provides gentle even heating.


 

As if this posting, this is eBay offering is selling for just $14.99. Shipping is also free to many US addresses.

Fermenter Heater Wrap Around Heater 110V/32W

Alternate Use Tip

I use a similar heat mat to help remove stubborn keg labels.  See: Removing Keg Labels… A Trick That Makes it Easy! – a section of our keg rebuild how-to

Related: Maintaining Fermentation Temps in Colder Weather

Inkbird ITC-308 Digital Temperature Controller| Review