Hands On: the Growler Saver Pressurized Growler Cap!

Steve, the homebrewer behind the Growler Saver Growler Cap generously sent me a pre-production Growler Saver cap to try out.

The Growler Saver Cap.  Left side is the CO2 port.  Right side is the Pressure Relief Valve.

Inside of the cap

CO2 Injector and catridge

The injector includes a safety lock to be engaged when the device is not in use.

The CO2 injector attached to the Growler Saver.  General operation instructions for preserving full or partially full growlers is to tap the CO2 injector and pull the PRV.  This flushes the headspace.  Another tap and you’re done.  You can also force carbonate with this device.  In that scenario you would tap the CO2 injector until the PRV vents.  Full instructions will be included with production Growler Saver caps.

A Draft System CO2 adapter is also available.  With that you can hook this right up to your kegerator.

A growler with the installed Growler Saver cap easily fits in my beer fridge.


To test the Growler Saver, I filled it with 24 ounces of beer.  That’s just over 1/3 full.  I put on the Growler Saver purged the growler and then gave it another tap for storage.  Next I swirled the growler.  Normally, CO2 in the beer would come out of solution into the head space until equilibrium is achieved.  I let the growler sit, in the refrigerator, overnight.

The beer that is pictured was poured from a growler that was filled to around one third full, was swirled and then sat overnight.  This beer was well carbonated in spite of that treatment because of the Growler Saver.  I think this is a great product.


Uses Include:

  1. Preserve growlers of beer.
  2. Force carbonate or re-carbonate beer.
  3. Save the last bit of a batch that won’t fit into a keg.  Put it in a growler and force carbonate with this cap.

You could also make the case that the Growler Saver is a safety device.  Get a growler filled with well carbonated beer at a local brew pub and let it warm up a bit.  The pressure in this growler rises.  At 60 degrees it’s around 25-30 PSI.  The Growler Saver vents at below this pressure.

The Growler Saver Kickstarter project is coming to a close.  Check out the project – Here


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14 thoughts on “Hands On: the Growler Saver Pressurized Growler Cap!

  1. Bret

    Any idea how much this will be sold for? I would imagine it won’t be much cheaper than $50. If that’s the case, do you think it’s a good value when new 2 gallon cornys go on sale for well under a hundred and a carbonator cap costs less than $15?

    Reply
    1. Chris Brewer

      Check out the kickstarter page, there are several packages available. I think it’s a good product and I hope it makes it to market. I think small corny kegs serve a slightly different purpose and that solution may fit better for some. For me, I’d like to have both to choose from.

      Reply
    1. Mike Balk

      I believe that refers to saving the beer that is in a growler. Normally you would have to drink the contents within 24 hours. Not a problem for some people, true, but with the Growler Saver, you can keep that beer for yourself, have a glass every day, and still have fresh beer a week later (if you took that long to drink a growler!).

      Reply
  2. Jason Putnik

    Pretty sure Growler Saver stole my $90 and skipped town. The owner hasn’t posted an updated to the Kickstarter supporters or Facebook in over a month and a large number of supporters never received a shipment, even when they promised to be shipped in December. Sad day. Losing faith in these Kickstarter projects.

    Reply
    1. Chris Brewer

      I just facebooked the guy behind this. I know they have been plagued with supplier issues, but it was my understanding things were still rolling, albeit slowly. I’ll comment back here if/when I hear something.

      Reply
    2. Anonymous

      Have you heard anything further? There are many backers still waiting and Steve hasn’t posted an update and doesn’t seem to reply to emails/kickstarter messages.

      Reply
    3. Chris Brewer

      He’s explained the delay. It’s related to the co2 conversion kits. He also offered to ship growler savers separately without the kits (for $5 additional shipping). I’m in this group and haven’t gotten my kickstarter reward either.

      Reply
    4. Rich

      Hi, I’m in this group too and just tried to contact them without any luck, I even tried to go to their website and fill out the form on that page. I’m glad I’m not the only one. I honestly wish they would update kickstarter so at least we know they have not forgotten us. The crazy thing is you can now buy these at some homebrew suppliers. I’m not sure how they are doing that without supporting the people who helped them get off the ground first.

      Reply
  3. merchtex

    I can also vouch for the feedback Chris has received. We distributors are also awaiting the CO2 conversion kits to be delivered, and I know Steve is working through the supplier issues. I’d much rather the final product be both safe and functional than have any shortcuts taken in haste. I can just imagine the backlash and difficulty reconciling the issues if a poor union or connection of some sort within the conversion assembly caused a user’s CO2 tank to be depleted prematurely.

    Reply

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