Our customers asked for an eco-friendly bottle option, and we delivered. Inspired by the success of the Kiinde award-winning Twist system, the unique air-free feeding design of our new bottle features a silicone inner sleeve that collapses as your baby drinks, eliminating the gas-inducing air. The silicone inner sleeve can be flipped inside-out for easy washing and drying, and it can also be boiled, sterilized, microwaved or frozen. The bottle system has no straws, vents or valves, so it is easy to clean and assemble. All of our bottle parts are BPA-free and phthalate-free, and safe for the top rack of your dishwasher. This new silicone bottle is compatible with all Kiinde Active Latch nipples, and each box includes 2 medium-flow Kiinde Active Latch nipples with leak-proof snap-on nipple covers. The Active Latch nipple requires suction and massaging to get milk to flow, just like with breastfeeding. Kiinde Active Latch nipples are designed to teach and reward deep, wide, natural latching, for a seamless transition between bottle and breast. Active Latch Silicone Bottle is fully compatible with the Kiinde Kozii Pro Breast Milk Warmer and Bottle Warmer with steam-free SAFE heat technology, so you can warm your baby's milk quickly and safely. Moms, dads, and childcare workers all love the simplicity of Kiinde products.