Inexpensive alternatives to glass media bottles. These heavy-walled durable, square PETG bottles are graduated to contain. Reduced permeability to CO2/O2. Leakproof bottles and closures 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. Sold by the case only. 2-L size (Cat. No. 2019-2000) has molded-in handgrips and a 53-mm (53B) white closure. Bottles are sterile to 10-6 SAL, non-cytotoxic and comply with USP Class VI guidelines.