In designing our bottle, we sought out to resolve all existing problems with standard baby bottles. We placed smart, non-leaking dual air-vents to prevent colic, made a truly wide-neck design for easy cleaning, and used a hygienic silicone material so that you never have to worry about toxic chemicals. Above all, our bottle is designed to mimic breastfeeding to help babies easily transition back and forth from nursing to bottle feeding. It's rescued so many families dealing with ‘nipple confusion' and ‘bottle rejection' that our Comotomo mama's coined the term “Breastfeeding in a Bottle!”