The Natural bottle with an ultra soft teat more closely resembles the breast. The wide breast-shaped teat with flexible spiral design and comfort petals allows natural latch on and makes it easy to combine breast and bottle feeding. The Natural bottle is designed to prevent leakage whilst feeding, and the Anti-colic valve helps keep air away from your baby’s tummy. Offers a flow rate suitable for your 1 month old baby and older. All Philips Avent products are compatible with one another and are easily interchangeable. The BPA free bottle has few parts for quick and simple assembly and cleaning. Set includes 3 pieces of the same bottle size and type.