Big Mouth Bubbler® EVO 2 - 6.5 Gallon

SKU: U41326

The fermentor that started it all, reinvented again! We’ve taken the revolutionary Big Mouth Bubbler® glass and re-engineered it with the help of world-class Polish master glassmakers to ensure sturdy, solid, superior craftsmanship.

Extra-thick glass eliminates oxygen permeation and keeps your brew safe. Banish bugs and bacteria with perfectly air-tight seals from a carefully ground, completely smooth and obsessively flat neck top.

In the evolution of Big Mouth Bubbler®, we’ve added some perks! Instantly measure volume with gallon graduation marks. Easier transfer of clear beer with a taller, narrower body while ensuring less liquid is left behind.

Caution: Big Mouth Bubbler® is a large hand-formed glass item that can be easily damaged if not used with proper care and handling. It may have variations in shape and thickness, and will show the normal bubbling characteristics of hand-formed glass. Extreme changes in temperature or sudden contact with hard surfaces may cause glass to crack. Handle with care–we strongly recommend using the Big Mouth Bubbler® carrying harness for increased safety and ease of handling.

Please note: This item does not qualify for flat rate shipping.

Availability: In stock

From: $54.99

To: $84.94

total: $0.00

Big Mouth Bubbler™ EVO 2 - 6.5 Gallon

  • Big Mouth Bubbler™ EVO 2 - 6.5 Gallon
  • Big Mouth Bubbler™ EVO 2 - 6.5 Gallon
Big Mouth Bubbler® EVO 2 - 6.5 Gallon Glass Fermentor   +$54.99

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Bid your funnel and siphon sayonara! Pour cooled wort directly from your kettle into the Big Mouth Bubbler® for instant transfers. Pitch yeast without it running down the sides of your fermentor. Easily add flavorings to secondary, and then just as easily remove them!

Gallon graduation markings help ensure precise measurement of fermenter volume.

Last but not least, you asked and we listened—more space for adhesive fermometers than any other glass fermentor! The most obsessively engineered glass fermentor ever created—we are proud and excited to introduce the new and improved Big Mouth Bubbler® EVO 2.

Note: We still strongly recommend the Big Mouth Bubbler® carrying harness.

Each Big Mouth Bubbler® Includes:

  • Big Mouth Bubbler® Glass Fermentor, Lid & Stopper
  • Big Mouth Bubbler® Microfiber Cleaning Cloth


Additional 5.5 rubber stoppers can be purchased here: No. 5.5 Stopper - Drilled


SKU U41325 U41326
Height (w/ lid, closed) 18 17.5
Diameter 10.25 12
Mouth Diameter 5.25 5.55
Lid Material PP PP
Lid Seal Material PE Foam PE Foam

Customer Reviews

As for the thermometer Review by charles
Ad touts more room for temp tape. Yes, a tape thermometer is better than nothing but does not give you an accurate picture of what's going on inside. I found about a 5 - 6 degree variance during active fermentation between tape and internal probe once I started using my conical. More space for temp tape is not a reason to buy this product - though I did put one on mine. (Posted on 4/17/15)
Good product but... Review by charles
I was pleased with the quality overall but the hole in the lid is not large enough to accomodate the auto-siphon I bought from NB. Bummer. Trying to handle the auto-siphon with lid removed and the large hole is quite difficult. I've since bought a fast-ferment plastic conical which makes this unit and my other carboy fermenters obsolete. (Posted on 4/17/15)
Good stuff! Review by Zon Brewer
I just purchased all of my equipment from here. Overall I am very happy. These EVO 2 carboys are nice. I give it 4 stars, only because one out of two of the tops STRIPPED out the threads and doesn't screw on tight. FIRST time I tried to use it. Glad I ordered two of these. I will be contacting to get a replacement. Other than that, everything is HIGH quality. I would definitely recommend. (Posted on 4/12/15)
Early Adopting Sucks Review by Chris
I of course early adopted the v1 Big Mouth glass and was loving it over carboys. However, hated the inside grooves for clean up, hated not having measurement graduations, not enough grip lugging it around, and no area for proper coverage for the stick on thermometer. The EVO 2 quickly addressed all these issues and seems superior. NB...will you take trade-ins? (Posted on 3/2/15)
Overall VERY good Review by Paul
I have the original glass BMB and the plastic BMB. So naturally I had to get this.

It is thicker and sturdier in feel. Which is good. The 6.5 gallon capacity is nice but 7 gallons would have been even better. I say that because I've got 5.5 gallons blow out the top currently (WLP001 is crazy).

The lid is great. Nice tight seal. But, the 15/16 blowoff tube doesn't fit snuggly. I will try to find 1" to fit inside. I got 1.25" OD tubing to fit OVER the threaded portion, but it doesn't seal tight either.

Overall I am very happy with this fermenter and will likely get a second soon.

They fit inside a milk crate for easy/safe transportation. (Posted on 2/23/15)
Kiss carboys goodbye Review by Robert
I am so happy I got one. Super sturdy and stable. Very easy to dry hop, or in the case of my first beer drop in a bag of oak chips. I look forward to lots of easy dry hopping in future beers.

I would agree with another review that the lid is a little tricky to get sealed down all the way, you have to almost practice at it and I did take the advice of using another gasket. Might use another gasket next time actually.

I have no desire to use a standard carboy again. (Posted on 2/19/15)
Perfect for fast and easy cleanup. Minor lid problem Review by Seth
Bought two of these a month ago. Finally got around to brewing a batch in them. 48hours into brew there was little to no airlock activity, with plenty of (visible) fermentation action going on. I knew their must be a leak. The lid is very tight to screw on, Which is fine but it was hard to tell when it was tight at first.
I highly recommend buying a couple extra gasket sets with these. I had to add two extra gaskets on top of the one that comes on the lid to get an air tight seal.
Once I screwed the lid on with the extra two gaskets installed, the airlock (Stype) activity started immediately. It has been working perfectly ever since. I'm crossing my fingers for no contamination but only time will tell.
I still gave these five stars because they are light years ahead of my regular carboys which I'm not sure I ever got as clean as I wanted. With these cleanup is a breeze. Cuts time in half. Transferring liquid is also made much easier. They seem to be plenty solid, gotta love the volume markers on the side as well.

Props to Northern Brewer as well. Their customer service is top notch. Any minor problems I've ever had they helped solve the issue immediately. (Posted on 2/12/15)
Great improvement overall Review by Anthony
Much thicker than the original, feels much more durable and no air bubbles in the glass. Seems to seal well, however unlike the description states, the top of mine isn't very smooth, but doesn't appear to be affecting the seal of the unit. The 15/16" optional blowoff hose fits very poorly - was a waste of money, a 1 inch od hose provides a perfect fit. Overall it is definitely an improvement over the original. (Posted on 2/3/15)
Gotta get one (or more) of these! Review by Ted
After investing in the EVO 2, I have found some definite improvements over the original Big Mouth glass 6.5. While I still use the original, the EVO 2 has a thicker feel and a nice milled ring at the opening. What I really like are the gallon increment measurements on the side so there is no guesswork when filling it. Cleaning is a breeze. You won't be disappointed with this product. (Posted on 1/31/15)
New and Improved Review by Allen
I ordered as soon as the new EVO 2 showed up on the site. I also have the original so here is the first side by side review.
1. The glass is much heavier +++
2. The grid work of ridges is gone +++
3. There are graduation marks like the plastic model +++
4. The top is nicely ground flat to make a good seal +++
5. The cap is the same so I'll drill a thermowell port as before.
6. This model came with a rubber stopper instead of the airlock cap that came previously. +
7. The lid on this one takes more torque to put on than my original. This is not a big problem. I believe the threads on the fermenter have some extra material along the mold lines on each side. I will remove it and see if that is the issue.

All in all a great response to the suggestions on the previous model. Love the thicker glass. (Posted on 1/27/15)

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