Twistshake's glass baby bottle is made from borosilicate glass, which is extra durable and lightweight. The baby bottle is ergonomically designed to provide the best possible grip and is enclosed in a protective, BPA-free and removable silicon casing that protects small hands against heat. This baby bottle is naturally odourless and is free from harmful chemicals such as BPA, PVC and phthalates. The baby bottle can be warmed in a microwave oven and can cope with the transition from frozen to boiling water thanks to its heat-resistant properties. Since the bottle is made from borosilicate glass, it is also scratch-resistant. Teat in size M (2+ m) with integrated anti-colic system included. Lightweight.