The Comotomo Baby Bottles 2-Pack features soft anti-colic nipples made of silicone for a breast-like feel, suitable for babies from 3 months old. The 8oz bottles are heat sensitive, self-sterilizing, and dishwasher safe, with a microwave-safe design for convenience. The green collar adds a pop of color to the clear bottles, which are scratch-resistant and feature a wide neck for easy cleaning. This BPA-free bottle set is designed to mimic breastfeeding to help prevent nipple confusion.