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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
63 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
great glass not so great lid
I think the glass container is an excellent vessel, however the down fall of this product is the lid.

Unlike the lowest starred review here my lid fit rather nicely. My quip or gripe about the lid is the gasket.

They used a cheap styrofoam gasket. It just seems to be like stuff can get caught in between the gasket and the lid. I wish they used a silicon gasket which I could remove and clean after each use.

They do make the universal lid for the bubblers, however from what I've seen online they don't exactly stay on against the pressure of the fermentation. people have gone as far as taping the lid down.
styrofoam gasket
styrofoam gasket
November 28, 2016
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
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
The lid sucks
Nice heavy glass jar, the lid, however, is difficult to screw on tightly enough top get an airtight seal. Would only recommend to anyone not desiring an airtight seal.
March 28, 2017
7 months ago
The lid is cheap
This would have been a good product but the lid is very cheaply made. To get the lid on and off I really have to work at it because the lid's threads don't smoothly seat into the threads of the opening. Sometimes I can't even get the lid to start threading, other times I can barely get the lid off. I thought maybe someone at the factory cross threaded the lid but I don't see any damage. Maybe mine was just defective but I'd not recommend this product to others.
September 21, 2016
One Gallon Big mouth bubbler
Wow, a product I can finally say is super! It will be perfect for my Kombucha Scoby as a hotel in the refrig between Kombucha batches. I assume they will allow this post as they didn't on my negative review of the Kombucha Fermenter, which is only a water dispenser! But hey, it's their website and they want positive reviews not always the truth!
August 1, 2017
2 months ago
Lid needs work
These fermenters are great for small batches and easy to clean. The lids are a bit loose when screwed on as mentioned in other reviews.
July 10, 2017
4 months ago
Love it
I have a couple of these and I have have never had any issues with them. The airlock that comes with it works well enough as long as you don't have any blow off. I like using these for a secondary fermentor when using fruit additions.
April 25, 2017
6 months ago
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
For beer, and kombucha!
I love brewing I will brew pretty much anything if I can, and when i saw this little guy I had to have him! Its filled with beer at the moment, and later on it will be filled with kombucha and even homemade strawberry wine... if I get enough strawberries on my plants. it did come with this plastic thing i have no idea what it is so I tossed it, I don't think I will need it. It's the perfect small batch brewing vessel!
December 20, 2016
10 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 33 questions Browse 33 questions and 76 answers
I've been fermenting this beer for about 6 days in the Little Big Mouth Bubbler and I'm still not noticing a foam head. Any idea what's up?
A shopper on Dec 6, 2016
Little Big Mouth Bubbler®
Little Big Mouth Bubbler®
Dead Ringer® IPA 1 Gallon Extract Recipe Kit
Dead Ringer® IPA 1 Gallon Extract Recipe Kit
BEST ANSWER: I had a similar issue that I tracked down to not making a complete seal due to a small seed on the top of the glass ridge. Sanitize a paper towel and wipe the gasket on the underside of the lid and the top glass rim. That did the trick for me.
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.
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 comes with an airlock of sorts but not the usual brewers airlock. The hole in the lid has a cap that snugs over it (but allows airflow). All of that is at the bottom of a depression in the lid that can be filled with water. It's a lot like some of the sour kraut/ kim chee jars I've seen. It would certainly work for brewing as well but a proper airlock would be much more convenient.
Says it comes with a single port lid and rubber stopper. What size stopper does the single port lid require?
David M on Sep 11, 2016
BEST ANSWER: David, I don't know the number designation for the size of the stopper. I just know it will fit the lid of the big mouth jug. I suggest you call the 800 tel number for Northern Brewers and ask for the specific size designation for the stopper. The few times I have had to call customer service, have had very good success with the reps.
Good luck.
Where are the markings for 1 gallon?
A shopper on Apr 9, 2017
BEST ANSWER: They are wherever you put them. You should fill a gallon jug with water, empty it into the bubbler, and mark the level with a strip of masking tape or painter's tape. What I did was place a strip of tape on two sides, opposite of each other. I made my marks very slightly above the exact one gallon level. The bubbler is much better than using a plastic bucket for primary fermentation. Hope this helps.
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.
how big is opening?(dimensions)
A shopper on Apr 24, 2017
BEST ANSWER: The inside dimension of mine is just over 5.5". I think 6" is the "nominal" diameter (center of one side to center of the other side), and 6.5" is the outside dimension.
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.
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.
can I sterilize by putting in oven without lid?
James K on Apr 30, 2017
BEST ANSWER: I would avoid doing that. Heat treating the glass sounds like an accident waiting to happen. Chlorine bleach and water solution will sterilize anything and as long as you rinse thoroughly after, it won't affect the quality of your beer. (Speaking from experience). I would definitely go with a solution sanitization method instead of heat.
We just purchased this kit to make 5 gallon batches. Now, we are trying to determine what additional equipment will be needed to make a 1 gallon batch instead. So far we have the 2 gallon kettle, Little Big Mouth Bubbler and airlock (fermentation), and 2 gallon bucket (bottling) which I have referenced below. Is there any siphoning/tubing, etc. we will need for this smaller set up that we cannot use from the 5 gallon Brew Share Enjoy Starter Kit? Thanks!
Amanda K on Feb 15, 2017
Little Big Mouth Bubbler®
Little Big Mouth Bubbler®
Three-Piece Airlock
Three-Piece Airlock
2 Gallon Stainless Kettle
2 Gallon Stainless Kettle
12 oz. Beer Bottles - 24 Pack
12 oz. Beer Bottles - 24 Pack
Master Vintner™ 2 Gallon Bucket Fermentor
Master Vintner™ 2 Gallon Bucket Fermentor
Homebrew Starter Kit - Brew Share Enjoy®
Homebrew Starter Kit - Brew Share Enjoy®
BEST ANSWER: I went from 5 gallon to 1 gallon brewing some time ago. Since then I have moved to 3 gallon brewing. My point is I'm working off of memory. From memory I think the only additional equipment I needed was the fermenting bucket. I also bought a 1 gallon carboy that needed a new rubber stopper but the airlocks from the 5 gallon still worked fine. I used the same hoses/tubing. As far as I can remember all I needed additionally was the 1) bucket. 2)carboy 3) rubber stopper for the carboy
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.
Would this handle subzero temperature down to -86C? The Ethanol will handle it but I'm concerned about the lid and the seal.
A shopper on Apr 14, 2017
BEST ANSWER: Great Question...Though this vessel is strong and durable I am not sure of its sub zero capabilities. Most things in the low temperatures you are explaining will become extra brittle and possibly predisposed to breaking. The lid is plastic which you are correct will most likely become brittle. The seal is a soft thin foam which should be OK even at low temperatures.
I do not see a 2 gallon bucket available in the "beer" section but assume this would be exactly the same (except for the bucket logo). I'm looking for a bottling bucket for adding my priming sugar mixture and beer from 1 gallon batch fermenter (Little Big Mouth Bubbler). I do not see any small 2 gallon-ish buckets with spigot for easier transfer to bottles. Is this 2 gallon bucket the best option?
A shopper on Feb 15, 2017
Little Big Mouth Bubbler®
Little Big Mouth Bubbler®
Master Vintner™ 2 Gallon Bucket Fermentor
Master Vintner™ 2 Gallon Bucket Fermentor
BEST ANSWER: That is the only 2-gallon pail, a person could modify it with a spigot to make themselves a small bottling bucket. Another option would be to siphon direct from the fermenter, and use the Fizz Drops that you put directly into the beer bottles before filling, so that the priming sugar does not need to be stirred in.
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 brewmaster@northernbrewer.com 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.

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