Just rite 12932 Poly Carboy, 20L, 120mm Cap, These polypropylene carboys feature large handles and base with molded grip allowing you to easily lift and pour. The material type and volume are printed on the outside of the carboy along with large, easy-to-read metric graduation marks that are certified to ±5% accuracy. The included polypropylene cap with platinum-cured silicone gasket provides a tight spill-proof seal. Constructed from USP Class VI, FDA grade polypropylene resin, the translucent carboys provide good chemical compatibility when using with various reagents, buffers, and powders. Carboys are compatible with interchangeable caps and adapters. Recommended autoclave cycle: 15 PSI and 250 Degrees Fahrenheit for 20 minutes.