Comotomo products are designed to be better than good. Their innovative silicone bottles were designed to be an alternative to standard baby bottles. With their soft silicone body and rounded top, they are designed to most closely mimic breastfeeding and reduce bottle rejection and nipple confusion issues. Dual anti-colic vents prevent unwanted air-intake and reduce colic, gas, and spit-up, plus they are free of harmful chemicals and safe to use in the microwave, dishwasher, and sterilizer. Parents swear by these one-of-a-kind bottles!