These carboys have a screw in dispensing spigot that can be replaced with a plug (included) when the vessels are used for long-term storage. Heavy knurling on the cap provides excellent grip for opening and closing. The smooth sides accept adhesive labels and can be marked with most indelible markers. Dispense cleaning solutions, laboratory chemicals, disinfectants, and intermediate phase mixtures and slurries for various manufacturing processes. The spigot opens fully in one half turn. Molded of polyethylene which resists corrosive acids and alkalis. Extra heavy walls, yet lighter than glass. Sold per each.