Gallon Plastic Carboy - accomodates #10 rubber stopper (solid or drilled for airlock). Specs: THE VINTAGE SHOP PET CARBOYS - Designed for wine and beer makers. No BPA. Thicker walls for less permeability. Sediment or yeast will not attach to the walls. Flat base makes the carboy easy to clean with brush, adhesive thermometer can be attached to the outside wall.