The all-new Fermonsters are a culmination of all the best fermentors on the market.

The Fermonster Plastic Carboy fermenters are made from PET plastic (same as 2L soda bottles) which is far more resistant to oxygen than regular plastic, they are brilliantly clear, food-grade and safe.

There arebuilt-in markers on the side.

The 4″ wide mouth opening is perfect for easy clean up.

Lead seals tight with provided rubber gasket.

Rib-less sides also make mixing and cleaning a breeze.

Requires a #10 stopper or medium universal bung.