Available in four sizes: 125 mL, 250 mL, 500 mL and 1L Packaged in two convenient, shrink-wrapped trays within an outer bag to assure cleanliness Break-resistant, ergonomic, and easy-to-handle alternative to glass Sterilized to 10-6 SAL and certified nonpyrogenic Leakproof, tamper-evident 31.7 mm HDPE screw cap Molded graduations for accurate measurements USP class VI compliant bottles are validated noncytoxic and nonhemolytic New 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.