Comotomo baby bottles are deisgned to most closely mimic breastfeeding to reduce bottle rejection.Ultra wide neck design allows easy cleaning by hand without a brush.Safe in microwave, boiling water, dishwashers and sterilizers.Nipple and body is made of 100% safe hygienic medical grade silicone.Dual anti colic vents prevent unwanted air intake and reduce colic Comotomo Natural Feel Baby Bottle, Pink, 8 Ounce