This 250mL (8 ounce) Polyethylene Terephthalate Glycol (PETG) media bottle by Nalgene® is an inexpensive alternative to glass media bottles. The bottle is heavy-walled durable and graduated to contain. Reduced permeability to CO2/O2. Bottle and closure are radiation-sterilized and non-pyrogenic to eliminate costly washing depyrogenation and autoclaving steps. Heat-shrink band around closure and neck provides tamper-evident seal. Packed in shrink-wrapped trays. Sterile to 10-6 SAL non-pryrogenic non-cytotoxic and comply with USP Class VI guidelines. Polyethylene Terephthalate Glycol (PETG). Capacity: 250mL (8 ounce). 48/Case. Nalgene® #: 2019-0250.