TWO x Stainless Carbonation Cap for PET Bottles by Luckeg – $17.99, $9 each + Fun With Carbonation Caps!
PET Bottles Beer Carbonation Cap 2 PCS – Counter Pressure Bottle Filling with 5/16″ Barb, Carbonation Beer Soda Water Brewed Beer, Fits Most Soft Drink PET Bottles by Luckeg
More InfoHighlighted Features
- Heavy Duty Stainless Steel for Carbonation Cap (2 PCS), Perfect Polishing Surface,with two four Food Grade Silicone Seal Rings;
- Unique Machined the Carbonation Cap, can fit Both Black Liquid Ball Lock Disconnect and Grey Gas Ball Lock Disconnect;
- The Carbonation Cap can fits Most Soft Drink PET Bottles, easy to Counter Pressure Bottle Fill PET Bottles;
- The Carbonation Cap can Carbonate Various Beverages, including Soda, Beer, Juice, Water or Clean Beer Line;
- Quality Guarantee: Any Defective for Carbonation Cap, Money Back or Replacement free.
Potential Uses:
- PET Bottles as Growlers: These are generally intended to convert 1L and 2L bottles to growlers. Fill up a 1L or 2L PET bottle with your favorite homebrew. Put one of these on (purge the headspace by squeezing if you want to) and then pressurize for transport. This should help to reduce oxygen pickup and maintain carbonation levels.
- Fine tune or rapidly carbonate beer: You can also use this cap to rapidly carbonate beer. Same process as for transport, just set your regulator to the proper pressure and shake or agitate the PET bottle to help introduce CO2. Or hook it up to CO2 and let it sit in you kegerator.
- Draft Line Cleaning Projects: I have developed three draft line cleaning projects using similar SS Caps – Build A Recirculating Draft Line Cleaning Pump | Mark II Keg and Carboy Cleaner Draft Line Cleaning Pump Conversion | Building a Simple Ball Lock Draft Line Flushing Setup
- Related Top Post: Fun with Carbonation Caps!
4/25 7 AM Central: These are selling for just $17.99. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices
PET Bottles Beer Carbonation Cap 2 PCS – Counter Pressure Bottle Filling with 5/16″ Barb, Carbonation Beer Soda Water Brewed Beer, Fits Most Soft Drink PET Bottles – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link
Bag o’ stuff
This is what you get with the basic pump. Tee, carbonation cap, pump and dip tube.
I installed this on a 2L bottle. You’ll notice the carbonation cap has changed colors. I used one I already had (Kegland brand, just a different color), because I already has a dip tube trimmed to size and installed from a recent update to 
Complete test setup
Ball Lock QD Installed on the pump assembly
It’s a little difficult to see but… it works. With some pumping, I got a slow steady stream of liquid. Keep in mind this is cleaning two 10′ lines at the same time.
Add on a ball lock faucet and you’ve got a portable serving keg without paying for expensive CO2 cartridges. Before you email me/comment/etc… yes this will cause oxidation, I would not suggest this as a long term solution. Only for the occasion that you and your friends will be able to drink an entire growler in an evening. Oxidation won’t have enough time to become a factor. Use another solution for longer term applications.
Remove the tee, add a 
Replace the pump with another carbonation cap, use a 2.5 liter bottle and… you have a 2.5 liter keg you can use in your kegerator!
The box. This is a “hand held” stainless steel faucet. It could also be called a stainless steel picnic faucet or stainless steel cobra faucet. It’s manufactured under MoreBeer’s 
