Polyethylene terephthalate (PET) bottles are ideal for storage and sampling of media, biologicals, and other aqueous solutions. The PET resin makes the bottle lightweight, break-resistant and as transparent as glass. Features: Packaged in two convenient, shrink-wrapped trays within an outer bag to assure cleanliness Break-resistant bottles are an ergonomic and easy to handle alternative to glass Bottles are sterilized to 10⁻⁶ SAL and nonpyrogenic. Leakproof, tamper-evident 31.7mm HDPE screw cap Molded graduations for accurate measurements USP class VI compliant bottles are validated noncytoxic and nonhemolytic