Comotomo Baby Bottles feature innovative and sensible design to most closely mimic natural breastfeeding. Our naturally shaped, soft, silicone nipples are ideal for babies who have trouble transitioning from nursing to bottle feeding. Your little one will love to hold onto the skin like, soft and squeezable body that is like no other bottle in the world. And you will fall in love with our wide neck design for brushless, stress free, cleaning bliss. Our bottles are equipped with truly innovative vents that are smartly designed to prevent colic, while completely eliminating annoying leaks. They are quite possibly the most thoughtful bottles ever made. 250ml/8 ounce bottles come with medium flow nipples (2 holes) ideal for 3-6 months. Comotomo baby bottles are designed to most closely mimic breastfeeding to reduce bottle rejection and nipple confusion issues. Ultra wide-neck design allows easy cleaning by hand without a brush. Nipple and body is made of 100% safe hygienic silicone. Safe in microwave, boiling water, dishwashers and sterilizers. Maximum temperature for bottle and nipple is 180 degree Celsius and 120 degree Celsius for cap and outer ring. Dual anti-colic vents prevent unwanted air-intake and reduce colic. Ideal for breastfed babies. 100% safe materials: BPA, PVC, Phthalate free.