Specifically designed for packaging and shipping media, buffers and sera. These heavy-walled, durable, square PETG bottles save space, are shatter-resistant and provide excellent gas barrier properties. Feature molded-in graduations, drip-proof neck finish for aseptic techniques and molded-in neck ring. Bottles are offered with and without closure. Bottles meet current biological and pharmaceutical regulatory standards including: USP Class VI, non-cytotoxic, non-pyrogenic, USP 661, European Pharmacopoeia for Abnormal Toxicity and trace elements.