Tommee Tippee Natural Start Baby Bottles, Glass, 250ml, 0m+, Pack of 1 Naturally sustainable. Made from medical grade glass that’s long-lasting and won’t stain. Soft, silicone teat, that flexes and stretches like a breast Anti-colic valve, to keep gas away from baby’s tummy Speedy self-sterilising, in just three minutes in the microwave* 100% leakproof with the lid (even when upside down) It’s also BPA free *Based on placing one bottle in microwaves from 700-1000w