This 2.5 Gallon Low Profile HDPE Container fits EF-4-63B and is small enough to fit applications where standard carboys are too tall. Features large carrying handle and indented hand grip on bottom for easy carrying and pouring. Supplied with a 63mm HDPE closure that is threaded and can be drilled out to accept a faucet. Carboys are made with food grade resins and are leakproof but not considered to be a shipping container. There is a small vent cap behind the handle of this lightweight carboy which can be partly unscrewed to relieve pressure.