Alkali Scientific™ Specimen Containers are specifically designed for collection and trasnport of Microbiology, Urinalysis, Pathology, Drug Testing and Histology specimens and are leak proof. All containers are available in Sterile and Non-Sterile formats. Sterility Certification for each lot is provided upon request. Leak Resistant - 95 Kpa compliant Exceptional clarity Proof of closure Graduation marking (3 sides) Top and bottom grip-knurl Manufactured from pure virgin medical grade plastic Quality Design, Dependable Service, Reasonably Priced