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Big Mouth Bubbler® EVO 2 - 6.5 Gallon Glass Fermenter with Harness

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Product details

The fermenter that started it all, reinvented again! We've taken the revolutionary 6.5 gallon Big Mouth Bubbler® glass carboy and re-engineered it with the help of world-class Polish master glassmakers to ensure sturdy, solid, superior craftsmanship.

6.5 Gallon fermenters are perfect for the primary stage of beer or wine fermentation. The extra head space allows for the production of krausen on a 5 gallon batch of beer. Also available as a 5-gallon secondary fermentor.

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.

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 the adhesive FermagraF° LCD thermometer 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.

Now Includes the Big Mouth Bubbler® carrying harness for lifting, transporting and ensuring your Big Mouth Bubbler lid stays firmly in place during even the most intense fermentations.

Each Big Mouth Bubbler® Includes:

  • New Big Mouth Bubbler® Universal Lid
  • Carrying Harness for Big Mouth Bubblers®

The new Big Mouth Bubbler® Universal Lid fits all Big Mouth Bubbler® Fermenters. The Big Mouth Bubbler® Universal Lid is just like a traditional carboy bung, only bigger! Just as easy to sanitize and set in place too. Removable ribbed silicone ring ensures a positive seal to keep out pests, while the non-threaded design allows the lid to move preventing an out-of-control fermentation from dangerously pressurizing your fermenter.

You will also need a Small Universal Carboy Bung - drilled or solid

Additional information



Product SKU 42900 (5 Gal.) 42898 (6.5 Gal.)
Weight 13.5 lbs. 16.5 lbs.
Height (w/ lid, closed) 18" 17.5"
Diameter 10.25" 12"
Mouth Diameter 5.25" 5.55"


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.

*Pro Tip: Save your box and use it as a cover for your fermenter!

Customer Reviews

Based on 5 reviews
Big Mouth Bubbler Evo 2 - 2 week review

Great, durable piece. Only wish it had a screw top

Great Christmas present for my husband

It was exactly as I ordered and came to my door in plenty of time for Christmas. Thank you!

It is a gift and I am jealous of it.

I bought this for my dad along with an extract kit. He doesn't new much, but wants to be brewing more. My reasoning was to buy him something to make clean up as easy as possible so that wouldn't discourage this mutually beneficial hobby of his.

Lid did not deal properly.

The lid would not seal. Tried several times. Had a batch in my pet bubbler , switched lids , the blue lid from pet bubbletubbed sealed my new glass one. The black lid from my glass bubbler worked on the pet. Luckey.

Had to Buy a Second One

I liked the Big Mouth Bubbler EVO 2 - 6.5 gallon glass fermentor so much that I just had to buy another. I think the second one will make it much easier to dry hop or add other adjuncts than my standard secondary fermentor.

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Big Mouth Bubbler® EVO 2 - 6.5 Gallon Glass Fermenter with Harness

Big Mouth Bubbler® EVO 2 - 6.5 Gallon Glass Fermenter with Harness