Comotomo Baby Bottles feature an innovative and sensible design to closely mimic natural breastfeeding. The naturally shaped, soft, silicone nipples are ideal for babies who have trouble transitioning from nursing to bottle-feeding. The ultra wide-neck design allows for easy cleaning by hand without a brush. The bottle and nipple are made of 100% safe hygienic silicone, and the product is safe in microwave, boiling water, dishwashers, and sterilizers. The dual anti-colic vents prevent unwanted air intake and reduce colic. The 5-ounce bottle comes with a slow flow nipple suitable for newborns up to 3 months. The bottle is scratch-resistant and designed to provide a comfortable and natural feeding experience for your baby.