The 90ml flip-top vial is constructed of 100% polypropylene resin. The vials are leakproof containers that have been tested for binding properties against major drugs of abuse testing targets such as marijuana and cocaine. During transport and storage, the polypropylene material prohibits drugs from binding to the walls of the container to insure optimum test results. The lid of the vial is attached to the container via a permanent hinge.
