Tippee Advanced Anti-Colic bottle works a little differently from regular bottles to help combat colic while ensuring a comfortable feeding for you and your baby. The unique 3-piece anti-colic venting system draws air away from milk and the star value keeps milk from traveling up the tube meaning less wind, reflux and discomfort. Plus, the anti-colic venting tube comes with a built-in heat strip that gives you extra reassurance that the milk is a safe temperature for baby. Contains: 2x 150ml and 2x 260ml Advanced Anti-Colic bottles with slow flow teats 2x 0-6m night-time soothers 1x bottle and teat brush BPA free. Anti-colic. Suitable for premature babies. Wide neck bottle. Naturally anti-colic*: 84% of mums who tested agreed the Tommee Tippee Anti Colic bottle had successfully reduced their baby's colic symptoms. Breast-like: Our soft silicone, breast-like teat feels closer to skin and flexes like mum for a natural latch and a comfortable feed - voted mum's #1 bottle for switching between breast and bottle*. Less air, more smiles: Tommee Tippee anti colic baby bottles have an Anti-colic tube that draws air away from milk to reduce colic symptoms for less wind, less reflux and less discomfort. Heat sensing technology: The venting tube features an in-built heat sensing strip turns pink when baby's feed is too hot. Most recommended baby bottle*: 95% of mums would recommend Tommee Tippee Advanced Anti-Colic bottles.