Northern Brewer - Big Mouth Bubbler PET Plastic Carboy Fermentor With Wide Mouth Universal Single Port Lid For Fermentation Of Home Brewing And Wine Making (5 Gallon, Plain) Revolutionary wide mouth eliminates the nightmare of cleaning and sanitizing. Stick your arm in to clean the entire inside with a swipe of the cleaning cloth. Superior to a carboy; A virtually indestructible fermentor Volume markers molded into the side of the vessel Uses a Standard-sized #6.5 Stopper (not included); ports that can accommodate most fermentation-monitoring equipment 5 gallon fermenters are best for the secondary conditioning stage of beer fermentation. Protects your brew: less bacteria, less spoilage. Virtually indestructible: 3 thick anti-flex ribs. Go ahead, throw it around! Smaller base diameter: save precious storage space <span class="a-text-bold">Oxygen contamination? </span>Not a chance. Exemplary, airtight design. <span class="a-text-bold">Cracks in the plastic?</span> No way. This bad boy could be thrown off a roof. <span class="a-text-bold">Lurking bacteria? </span>Nope! The wide mouth makes this carboy easier to clean than any before.