Finally an inexpensive and easy solution to keeping your homebrewed beer fermentation temperatures in control! 

Fermenting your homebrew at the right temperature is one of the critical factors in making good beer. 

Let the temperature get too warm, and your beer will suffer!  The typical desired ale fermentation ranges are 59-72 degrees F.  Add in the fact that active fermentation for a 5 gallon batch can raise temperatures 10-15 degrees F!    

Forget about dealing with a messy homemade cooler when trying to keep your homebrew fermentation temperatures cool.  Cool Brewing Fermentation Cooler is designed specifically to accommodate standard 6.5 and 5 gallon fermenters and carboys.  Neatly and easily keep your fermentation temperatures incheck.  Just add ice packs, ice, (frozen 2-liters work great) or anything cold and switch out as needed to reach the desired temperature. 

Save time and effort in that The Cool Brewing Fermentation Cooler is sealed, insulated and 100% waterproof so it will efficiently and neatly keep your temperatures in check.  When you’re done, the Cool Brewing Fermentation Cooler easily folds up for storage until the next brew day!


Why Cool Brew?

 -Up to twice as efficient and cleaner then homemade swamp coolers

- Much less expensive than custom kegorator or keezer set up's that cost $100's of dollars.

- Cool Brewing Cooler will work with multiple sized fermenters.

- 100% waterproof so will not leave condensation.

- It folds up for easy storage when not in use or travel.

- Will work great in condos and warm climates where you need a swamp cooler even for Ale’s!

- Contains the mess of any fermentation blowouts

Check out this great video review from The Homebrew Academy!

Try it risk free! If you're not completely satisfied return it for a 100% refund up to 45 days!

 Patent Pending

Now Shipping Internationally!


Typically all domestic orders are shipping within 48 business hours!

Please contact us at if you have any special shipping requests. (For domestic orders only)  We are now shipping internationally!  Just select the international option upon checkout!

What People Are Saying

Tried out the cooler for the first time yesterday, and wasn't disappointed. Using 3 frozen 2 liter bottles, I brought the temperature down to 58F from 69F in 12 hours. Good thing I'm using Notty yeast, because i didn't expect that much of a temp drop in that short of time. Super simple, super effective, and super easy. Highly recommended!
I have posted in this thread a number of times about how pleased I am with this cooler 'bag'. I even bought a second one to get me thru the summer. However, I have even more proof that my money was extremely well spent....... I live just outside of New Orleans (Metairie) a suburb and as some may know, we were lucky enough, almost exactly 7 years to the day to have another troubling hurricane that was supposed to be an easy one (I've been thru dozens in my life) but this one dumped lots of rain b
I am having tremendous success keeping my lager at a steady 50/52 (I use adhesive temp strips, so probably 51. Ambient temperature ~70) I froze five 3 liter Poland Spring bottles, put four in, and each morning and afternoon I replace a watery one with a frozen one. It is fermenting away, and I couldn't be happier. This product should definitely advertise the fact it can be used to cool down to lager temps, as that would be a big selling point for folks.
This thing is awesome. After a failed SOF build, I was going to give a swamp cooler a try but didn't really feel like dealing with the mess. This product seemed like a great alternative. Temperature is holding great and I am really happy with my purchase. Pros: Cheaper than SOF, low tech cooling solution, cleaner than swamp cooler Cons: None come to mind, loving it so far
I love this thing!
Used my cooler on my current batch. I've just been using a few of those cold packs and am easily keeping temps down where I want them. On top of that, I ordered another one today, and I had a tracking number from UPS in about two hours. Great product and great service.
Im in SoCal, with a very warm garage. This hold 65-70 degrees all day with a liter of ice. Very nice drop.
I really like the cool brewing bag overall. I have used it twice. The first time I filled the bag with water half way up my carboy. The second time I went with no water inside the bag, just air. It worked well in both cases. I live in the deep south and my house is at 80F (which sucks for me and the beer). I am easily able to keep the fermenter in the mid to low 60's with the cool brewing bag with both the water bath and just air methods. Another great thing is the bag collapses and is easily s
Over a week in and I'm so glad that I switched to using this product. Temps have been extremely consistent in the low to mid 60s when the outside ambient temp was 78-79F. Great product, and not having to have to monitor a swamp cooler is very nice.
I'm already very satisfied with this product. Getting consistent temps without all of the fluctuations that I used to have should result in better tasting beer. And in the end, it's all about better tasting beer!

Buy Now!

Cool-Brewing Fermentation Cooler
Fermentation Cooler
Cool-Brewing Fermentation Cooler Insert
Fermentation Cooler Insert

Wholesaler Retailer

Are you a Wholesaler or Retailer and interested in working with Cool-Brewing?  Please contact us at for more information.