Fermonster 1 Gallon Ported Carboy (Spigot Not Included)

Fermonster 1 Gallon Ported Carboy (Spigot Not Included)

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The Fermonster is a brand new fermenter designed specifically for fermentation. MoreBeer! gave product feedback for over 2 years of development and we think they nailed the design. The large lid allows for easy filling and makes hop or oak additions a breeze. The smooth sides are fantastic for sanitization - no ribs or texture to collect yeast or bacteria. The punted bottom allows sediment to collect to the sides so that you can siphon liquid from the center.  Because they are made from virgin PET plastic they nearly unbreakable and a lot safer than similar glass carboys.

These Fermenters are ported but do not come with a spigot. FE347 is the plastic spigot we recommend along with this fermenter.

Made from heavy PET plastic, the same material used in 2 L soda bottles, which is nearly impermeable to oxygen penetration.  Due to the thickness of the material and the overall geometry the Fermonster does not require ribs or dimples for stability.  That results in a super smooth interior surface that reduces yeast and sediment buildup making it the easiest to clean, most sanitary PET carboy on the market.  The huge 4" opening makes filling a breeze, and cleanup is as easy as wiping down the inside.

These fermentors are completely air-tight and the lids sealed tight with an O-Ring.  Additional O-Rings and Lids both with and without holes are available for purchase, see our You Might Also Need items below.


  • 4" inner diameter wide mouth carboy - easy to clean!
  • Food grade PET plastic construction is nearly impermeable to oxygen penetration
  • No hard to clean dimples or ribs
  • Punted bottom
  • O-Ring and Lid with one hole is included (Fits #10 Stopper)
  • Additional O-Rings and Lids available
  • Weight: 0.6 lbs
  • Temperature Limit: 140° F
  • Height: 9.45 inches
  • Diameter: 6.7 inches
  • Completely taste and odor free
  • Perfect for Beer, Wine, Cider, Mead, Kombucha or any other fermented beverage!

Please note: the pictured #10 Stopper (FE470VS) and three piece airlock (FE370) are not included.

Item # FE261TANK
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.59 LBS
Community Q&A

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Why did you choose this?
MoreFlavor Store
Sale price. Will use to split batches of Mead and Cider.
David Cubbage on May 26, 2020
Sale price. Will use to split batches of Mead and Cider.
David Cubbage on May 26, 2020
Is the hole already punched for the spigot? Or will I have to do that myself?
Preston Hunter Deason on Sep 30, 2022
BEST ANSWER: The hole is included.

3.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 4 out of 5
One Gallon plastic Carboy
I have used the 7, 6, 5, 3 and one gallon carboy. They all work well. I have not had any issues with the screw on tops and or the O-Rings. The plastic is somewhat thin, and if you pick them up it squeezes in the sides a little bit. This can cause air movement into airlock. However, if you do not overfill them it will not put any wine into the airlock. Overall excellent product, but would like to see them a little thicker.
January 17, 2019
over 3 years ago
Rated 3 out of 5
Not what I'd call heavy-duty; o-ring falls out of lid
1. The description says it's made from heavy PET, but the wall thickness is actually quite thin. The problem this causes is that when handling it once it's full of liquid, the sides push in, decreasing the volume of air inside. This causes pumping of the liquid in the airlock, causing concern that the airlock's function could be temporarily compromised.
2. The o-ring doesn't stay in the groove of the lid, so that putting on the lid requires that the o-ring be carefully placed on the rim of the fermenter, and then the lid even more carefully screwed on so as not to disturb the location of the o-ring until the lid is tight.
December 5, 2018