Big Mouth Bubbler 6.5 Gallon Glass Fermenter with Harness

  • Big Mouth Bubbler 6.5 Gallon Glass Fermenter with Harness
Big Mouth Bubbler 6.5 Gallon Glass Fermenter with Harness Big Mouth Bubbler 6.5 Gallon Glass Fermenter

Big Mouth Bubbler 6.5 Gallon Glass Fermenter with Harness

SKU 42898



Product Details

Big Mouth Bubbler® EVO 2 - 6.5 Gallon Fermentor is a revolution in homebrewing!

Now Including our Universal Harness for lifting, transporting and ensuring your Big Mouth Bubbler lid stays in place during even the most intense fermentations.

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. Say goodbye to that awkward brush and give your fermentor the deep-clean your beer deserves. Scrub off any unseen biofilm. Effortlessly wipe away crusted krausen in just a couple of carefree minutes. 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! 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.

Additional Information



Each Big Mouth Bubbler® EVO 2 includes:

  • Big Mouth Bubbler® Glass Fermentor 
  • Universal Harness for Big Mouth Bubbler


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.

You will also need a Small Universal Carboy Bung (not included) - drilled or solid.

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"

Customer Reviews

Based on 12 reviews
Matthew B.
good fermenter, so-so lid

For my money, glass is the best value for fermenter material and … this is glass. Glass is heavy, though, so the harness helps a lot.

Love the big mouth for cleaning purposes, but the lid doesn’t seal well on its own, so I duct tape it down. Problem solved for better beer than plastic and way cheaper than stainless steel.

Paul G.
New style lid is terrible / Midwest is great

Midwest Supplies was great! Fast shipping and very easy to work with... That being said, The new and "Improved" lid is a very bad design. it pops off during fermentation and leaks when you try to move the Bubbler.

Scott S.
Exactly what I needed

Already brewed mead, weisbier next

Jim W.

Easy to clean

Alexander N.
The Lid

The newer lid likes to back out, especially when wet or damp. Have to recheck and carefully reset with bubbler. The carrying harness can be tightened down to keep it jammed in but isn't conducive to quick removal/reinstall. I like the screw on tops for bubbles a little more. Sediment likes to resettle on the glass grooves too and easily remixes in when trying to rack the fluid. Easy to clean though.