Bel Art Scienceware® polyethylene carboys have easy grip handles and screw caps for leak proof shipping and storage. The thick walls have smooth interior surfaces to ensure that contents drain out completely and the knurled cap permits a positive grip when tightening. The smooth sides accept adhesive labels and can be marked with most indelible markers. Gasket seal in deep threaded cap offers watertight closure for storage or transport. Polyethylene resists acids and alkalis. Convenient 5 gallon (20L) size.