Supplier: Corning. Wide mouth, round media bottles are designed for heavy-duty storage, mixing, and sampling. Caps can be autoclaved. Non sterile. The extra-wide mouth (69 mm Int.Ø) provides easy access for pouring and removing pastes, powders, and larger items. Bottles exhibit high thermal shock resistance, and are usable up to 500 °C (932 °F) and in microwave ovens.