Justrite 12947 PETG Carboy, 5L, 83mm Cap, The ergonomic design on these copolyester (PETG) carboys features 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 container along with large, easy-to-read clear metric graduation marks that are certified to ±5% accuracy. Constructed from USP Class VI, FDA grade PETG resin, the carboys provide moderate chemical compatibility when using with various reagents, buffers, solutions, and powders. Carboys are compatible with interchangeable caps and adapters.