Pure glass bottle gift set with silicone sleeves. Philips Avent Glass Natural bottle with the Natural Response nipple lets baby control the pace of the milk, like they do when breastfeeding. The nipples’ unique opening and tip only releases milk when your baby actively drinks. When pausing to swallow and breathe no milk flows. Baby can drink, swallow, and breathe using their natural rhythm, just like they do when breastfeeding. A wide breast-shaped nipple with a soft feel to mimic the shape and feel of a breast. The nipple has a no-drip design which helps prevent lost milk from the tip. An anti-colic valve integrated into the nipple is designed to reduce colic and discomfort by sending air away from your baby’s tummy. The ergonomic bottle shape makes it comfortable for parents to hold. Made of premium quality borosilicate glass, a BPA free material. It is heat and thermal shock resistant, so it can be safely stored in the fridge, warmed, washed, or sterilized. Silicone sleeves are designed to protect the bottle and make it easy to hold.