Little Big Mouth Bubbler®


SKU# 41308

Flat Rate Shipping only $7.99 only from Northern Brewer
The perfect small batch primary fermentor. The Little Big Mouth Bubbler® fermentor holds 1.4 gallons - offering nearly half a gallon of extra headspace.

Cut down on cleaning with the Little Big Mouth Bubbler® and simply wipe it clean after primary through the wide opening.

To top it all off, the Little Big Mouth Bubbler® makes a great, inexpensive 4L yeast starter vessel!

Kit Includes:
  • Little Big Mouth Bubbler® Glass Fermentor 
  • Single-Port Lid 
  • Rubber Stopper
  • Does not include an airlock


Availability: In stock

Little Big Mouth Bubbler®

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  • Little Big Mouth Bubbler®
Product Details
The perfect small batch primary fermentor. The Little Big Mouth Bubbler® fermentor holds 1.4 gallons - offering nearly half a gallon of extra headspace. Cut down on cleaning with the Little Big Mouth Bubbler® and simply wipe it clean after primary through the wide opening. To top it all off, the Little Big Mouth Bubbler® makes a great, inexpensive 4L yeast starter vessel!

Kit Includes:
  • Little Big Mouth Bubbler® Glass Fermentor 
  • Single-Port Lid 
  • Rubber Stopper
  • Does not include an airlock
Additional Information
Support Documents:No
4.6 / 5.0
34 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Little Big Mouth Bubbler
Love the big mouth bubbler. Wish I had got it earlier. Easy to use for small batch beer kits. Easy clean up. Like the gallon and half size.
November 12, 2015
good little fermenter
nice and light, great for small batches. the glass is sturdy, and the big mouth is incredibly helpful for cleaning. the ridges on the inside are a bit annoying since sediment can get in them, but as long as I clean it right away it's not a real problem.
September 15, 2016
Excellent little fermenter
Very easy to use and clean. If you want to do small batch beer or hard cider this is an excellent piece of equipment.
October 26, 2015
Great for Split Batching!
Purchased 3 of these. Used them a couple different times for some experimental brews with different qty of ingredients. I like the fact that you can get in there to clean easily like the other Big Mouth's. If you use 1 gallon jugs currently or are considering other 1 gallon solutions.. do your self a favor and order these instead.. they do not disappoint.
December 1, 2016
1 gal. Bubbler
I'm no longer able to lift 5 gal. batches. This small batch fermenter lets me continue to home brew. Works well with included air lock. Super easy to clean.
August 29, 2016
Great for small batches
I have been experimenting with small all grain batches. The little big mouth bubbler provides extra head space and I can pour the wort directly in through a strainer. I'm looking forward to trying more small batch all grain beer.
November 19, 2015
Little Big Mouth
Its glass, its easy to clean. Got 1st one as 1gal upgrade kit with airlock and blowoff tube. Done 1 gal batches and have no complaints. No measure marks so made own with tape. Max vol was 1.5 gal(to bottom of neck). Got 2nd for brew needing 2nd ferment. I use filter bag across mouth and pour right from kettle, remove and add yeast.
September 6, 2015
The Little Big Mouth Bubbler
I make 1 gallon batches exclusively, I've been using 2 gallon buckets solely because there was no alternative that had head space. These are wonderful.
May 31, 2016
Great Small Batch Fermenter
Use Little Big Mouth for all my small batch fermenting of beer, wine and hard cider. Like built in air lock. Will buy another.
January 2, 2016
Little Big Mouth is Awesome!!
So, I've been waiting for these to come back into stock, and they're great!! I can split a batch of beer and try different dry hopping techniques and different yeast profiles along with other Recipies like meads and wines and have a variety of beverages at my disposal. It's awesome!!
June 2, 2016
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Browse 28 questions Browse 28 questions and 60 answers
does this product include an airlock? The description says it does not include an airlock but some of the questions/reviews mention it coming with one.
Brennan M on Dec 24, 2016
BEST ANSWER: It doesn't come with an airlock. It does come with a couple of styles of plugs one of which has a hole meant for a loop seal type airlock.

As a side note I really love my two bubblers and use them all the time for all types of fermentation projects. The wide mouth makes them invaluable and easy to clean and they are high quality all around.
Is the included rubber stopper drilled?
S E on Sep 5, 2016
BEST ANSWER: Yes, the stoppers are drilled. It is nice to have the option to use a traditional airlock in the drilled stopper or the airlock style cap.
Does the three piece airlock that comes with the small batch starter kit fit the little big mouth
Thomas T on Aug 5, 2016
BEST ANSWER: Any airlock will fit, but the three piece airlock fits best because there is no uneven seam along the airlock's stem like on other airlocks. This uneven seam tends to cause air leaks.
Can I wash the little big mouth bubbler in a home dishwasher?
S T on Jul 18, 2016
BEST ANSWER: Can you? Yes. Should you? No, it is best to wash these items by hand with a fragrance free, brewing specific cleaner. I could see a dish washer breaking one if there were other items in there.
Says it comes with a single port lid and rubber stopper. What size stopper does the single port lid require?
D A on Sep 11, 2016
BEST ANSWER: These come with a #5 stopper that fits nicely in the grey lid, to hold the airlock in place. A #5.5 stopper will also fit in this opening. -Mike W, Northern Brewer
does the little big mouth come with the #5.5 drilled stopper?
Thomas T on Aug 5, 2016
BEST ANSWER: If I remember correctly, it does, just doesn't include an air lock. Read the detailed info on their web page. Blow off tube is almost unnecessary since the extra headspace in the 1.4 gal. bubbler is enough to allow foaming up during fermentation and that is after pouring the entire contents of a 1 gal. kit into it ! Later on you can transfer to a carboy to try to eliminate some of trub. Be sure & get the lid screwed on tightly & not cross thread it (easy to do)
What is the round plastic piece that came in the small batch bubbler? It appears to be some kind of cap, with an outer rim that is notched, and an inner piece that looks like it would snap onto something. I don't see any instructions with this unit.
M E on Jul 17, 2016
BEST ANSWER: It's the airlock supplied with the bubbler. You put that on and then fill that bowl(the lid) with sanitized water and that is your airlock...I opt for the older air lock or just blow off tube personally.
Is there a harness available for this?
M I on May 31, 2016
BEST ANSWER: No, We do not offer a harness for this fermenter.
Can this be used with an airlock?
D A on Oct 16, 2015
BEST ANSWER: Yes, the Little big Mouth Bubbler includes a rubber stopper and a standard 3-piece air lock works well.
Is the lid for the little big mouth the same as the 5 gallon big mouth bubbler that was discontinued? I would like to buy a little big mouth bubbler and modify the lid to slip a temp sensor in a hole I would drill and seal.
J O on Aug 11, 2016

Thank you for contacting us. The lid on the Little Big Mouth Bubbler will fit on both the 5 and 6.5 gallon glass Big Mouth Bubbler's.

what size hose do I need? I have all the other items such as rubber stopper, airlock, and even Fermcap S.
John R on May 24, 2016
BEST ANSWER: If you intend to create a blow-off assembly, you can use a piece of 3/8" tubing and connect it to the center stem of the 3-piece airlock, and then drop the other hose end into a cup or jug of water. Another way is to use the large 1" ID tubing, and it will fit over the "lip" atop the grey Big Mouth Bubbler lid. - Mike W, Northern Brewer
These have been out of stock since last year. Can Northern Brewer make any commitment on availability?
David C on Apr 16, 2016
BEST ANSWER: Hello Dave,

Thank you for choosing Northern Brewer! The Little Big Mouth Bubblers are currently only available with our small batch starter kits. I am told they will be for sale individually in the near future, but we have not received word from our purchasing department as to when that date will be. I am sorry for any frustration and inconvenience that this has caused! Let me know if you have any further questions!
will this be back in stock soon?
Rufus S on Mar 4, 2016
BEST ANSWER: Hopefully! Supplies are limited and we are unable to buy them individually right now. Limited production due to some issues that hopefully can be resolved!
When is this item going to be back in stock!
S E on Nov 25, 2015

We're expecting it early next week!


Is the bottom flat enough to work on a stir plate (maelstrom stir plate for example)
Preston F on Oct 21, 2015
BEST ANSWER: I do not currently have a stir plate. However, in the spirit of helping fellow home brewers I would accept a stir plate and/or other products to serve as a consumer product tester for your venders, customers, and your products as well. For you, Northern Brewer, and only you I would do this. Your welcome.
What's the dimensions on these?
P A on Oct 4, 2015
BEST ANSWER: This is 10" tall with a 8" exterior bottom diameter
What material is the lid made of? Is there a gasket?
Travis H on Sep 29, 2015
BEST ANSWER: The lid is made of plastic and there is a gasket made of nylon.
When will these be available again? It looks like no one in the US has them in stock. I did find a place in Canada that had them but they don't ship to the states.
M I on Jan 7, 2016
BEST ANSWER: Thanks for the inquiry! These have become a little more limited so right now, we can only get them in premade equipment kits, and not on their own. I'll pass along the request so hopefully they can become available again. I don't have an ETA for you, sorry. I hope this helps in anyway! Cheers!
I need this to come back in stock the 2 gal buckets just don't deal good enough for me does anyone know when it will come in stock
D V on Dec 2, 2015

We just received a shipment so they should be available online in the next day or two.
When will these be back in stock?
C S on Nov 24, 2015

Should be in stock early next week.


What is the difference using the wide mouth bubbler vs using the fermentation jug for beer brewing? Mif both can be used, which one to use first and why?
G Q on Oct 14, 2015
BEST ANSWER: If Your jug is big enough the only difference is the bubbler is easier to clean and work with your wort/beer (stirring and adding ingredients as needed)
Im my case my jugs are 1 gallon, the little big mouth is 1.5 gallons, I need the extra head space for fermentation, 1 gallon jug is too small for initial fermentation of a 1 gallon batch.
I was using 2 gallon fermentation buckets but the seals on those are terrible, little big mouth seals up just fine every time
I think you should update your listing here to clearly indicate the total capacity of 5L or say the 1 gal of headspace is for yeast starters. This is confusing.
D A on Sep 11, 2015
BEST ANSWER: Thanks for the feedback! I'll be sure to make a note of that so we can update the page. In the future

for issues like this I recommend contacting Customer Service

either via email at or via phone at 1-800-681-2739.
Is it compatible with Big Mouth Bubbler� Plastic - Dual Port Lid / Big Mouth Bubbler� Plastic - Lid Ring?
S A on Sep 7, 2015
BEST ANSWER: The dual port lid for the plastic Big Mouth Bubblers is not compatible with the Little Big Mouth Bubbler
What size tubing would I need to put a blowoff tube on it?
P B on Sep 5, 2015
BEST ANSWER: You would want 1" ID vinyl tubing.
So if the Little Big Mouth Bubbler� fermentor offers nearly a gallon of extra headspace, what is the total volume?
R D on Sep 4, 2015
BEST ANSWER: The volume of the Little Big Mouth Bubbler is 5 Liters
actual size and capacity?
W I on Sep 2, 2015
BEST ANSWER: The Little Big Mouth Bubbler has a base radius of about 8.3" and is about 10.6" tall. It's total capacity is about 1.

Is this glass or plastic?
M O on Sep 2, 2015
BEST ANSWER: The Little Big Mouth Bubbler is glass.
How much does this hold. The description indicates 4l but also declares almost a gal of head space
Darin S on Sep 1, 2015
BEST ANSWER: The little BMB is a 5 liter fermentor actually....the reference is to a 4 liter yeast starter

since you would need extra head space as well in that.

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