Lightweight containers with tight-fitting lids. Molded of high-density polyethylene (HDPE) or polypropylene copolymer (PPCO). These white opaque containers are unbreakable. Designed to simplify and standardize the handling and storage of specimens. The containers are inert and cannot be attacked by formaldehyde or weak acids or bases. Will resist freezing or boiling. They have long shelf lives and are easily disposable. Sturdy enough for reuse. Easy to store, requires little space. Maximum temperature for HDPE is 230° F (110° C). Maximum temperature for PPCO is 250° F (121° C).