Inexpensive alternatives to glass media bottles. These transparent, heavy-walled, durable, square PETG bottles are graduated to contain. Reduced permeability to CO2/O2. 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 to assure sterility. Leakproof. Packed in shrink-wrapped trays. 2000mL size has molded-in handgrips.