Mini Fermonster – 1 Gallon Fermenter for Small Batch Projects

The Mini Fermonster is the compact version of our best-selling Fermonster fermenter, offering the same practical design in a 1-gallon (3.8L) size that’s perfect for small-batch and experimental fermentation projects. Made in Canada from clear, BPA-free PET plastic, it’s lightweight, durable, and easy to clean. The wide-mouth opening makes adding ingredients, cleaning, and sampling a breeze—no more wrestling with narrow carboy necks.

Each Mini Fermonster comes with a drilled lid and rubber o-ring gasket, ready to pair with a standard airlock (sold separately). Solid airtight lids and mesh strainer inserts are also available as accessories, making it a flexible option whether you’re fermenting fruit, herbs, or other ingredients.

Ideal for home brewers and fermentation enthusiasts looking to explore:

• Mead (including test batches with different honeys or fruits)

• Dandelion, elderflower, or spruce tip wine

• Berry or stone fruit wine

• Ginger bug or wild yeast starters

• Small-batch sour beer

• Kombucha scoby growth

• Craft vinegar production

• Pickling experiments

• Fermented hot sauce trials

• Overflow/yeast starter vessel for larger batches

Whether you’re trying a new yeast, testing flavour additions, or just want to dip your toe into fermentation without committing to a full 23L batch, the Mini Fermonster is the perfect solution.

Made from heavy PET plastic, these large mouth fermenters have easy access for cleaning compared to traditional carboys.

• FerMonsters do not use any plasticizer and are made with 100% Virgin material. Made with Food grade materials and BPA free.
• Comes with an O-ring and air-tight ONE PIECE lid with a hole that will take our #10 stopper. The lid hole is 4.3 cms (1.7”) in diameter.
• There are no ribs, only smooth sides, so no yeast or sediment will adhere to walls during fermentation.
• Solid lid is available as an option (not included in the product sold as a separate item) so you can customize your lid (drill as many holes as you wish).
• Completely taste and odor-free. It is also stain resistant.
• Impermeable to oxygen.
• 100% made in Canada (Right here in Metro Vancouver!)
• Also they are big enough so you can use them as your Primary Fermenter.
• Our FerMonsters™ are also ideal for making Kombucha as they can withstand Kombucha PH levels concentration.
•  Be sure not to add any liquid hotter than 53ºC (127ºF).
•  DO NOT steep tea on them if liquid is hotter than those temperatures.
•  DO NOT use below Freezing Temperatures, minimum recommended is 35F or 2 Celsius.
• A great addition to your FerMonsters™ are our FerMonster™ Strainers, MonsterMesh and MiniMesh. They will allow you to reduce the head space if required filling it up with glass marbles or any food grade element that you consider appropriate. They will help you infuse your wine/beer and handle all infusions. They fit all of our FerMonsters™.