US PATENT PENDING Innovation So Big You Can Fit Your Arm Through It! Meet the Big Mouth Bubbler, the revolutionary replacement for those water jugs known as carboys. Its mouth welcomes cleaning and facilitates a sterile fermentation environment. No bung slipping on a foamy carboy topthe Big Mouth cap is a twist off. Once you screw the cap on, ITS ON and not coming off until you say so. The Big Mouth Bubbler includes a drilled stopper and a microfiber cleaning cloth. CautionBig Mouth Bubbler is a large hand-formed glass item that can be easily damaged if not used with proper care and handling. It may have variations in shape and thickness, and will show the normal bubbling characteristics of hand-formed glass. Extreme changes in temperature or sudden contact with hard surfaces may cause glass to crack. Handle with carewe strongly recommend using the Big Mouth Bubbler carrying harness for increased safety and ease of handling. Prefer a traditional carboy? Please browse our complete selection of Carboys & Fermentors. Also available: Big Mouth Bubbler - 6.5 Gallon Fermentor