Even more natural thanks to improved teat: Philips AVENT natural teat for natural baby bottles. The breast-like teat with the flexible spiral design and the comfort pillow allows a natural drinking behaviour for your baby. The anti-colic system contained in the teat reduces colic and discomfort as the air gets into the bottle and not into your baby's stomach. The Philips AVENT natural teat is made of BPA-free material and is odourless and tasteless (Royal Philips NV list of regulated substances in products and product packaging, sl2018-2).