comotomo Baby Bottles feature innovative and sensible designs to closely mimic breastfeeding. A truly wide mound nipple is ideal for babies with difficulty transitioning from nursing to bottle (and back!). Your little one will love to hold onto the skin-like silicone bottle that is not only soft and comforting but also safe and highly heat resistant. We know that you will appreciate our truly wide-neck design (3-inch opening) and minimal parts that makes cleaning totally hassle-free! comotomo bottles are also equipped with dual anti-colic vents that are smartly designed to prevent colic while offering consistent milk flow without any leaks. They are quite possibly the most thoughtful bottles ever made! 5oz bottles come with truly slow flow nipples (1 hole) designed for newborns up to 3 months.