PREVENTS NIPPLE COLLAPSE - Evenflo Feeding's Patented Micro Air Vents help prevent nipple collapse, and promote a more comfortable feeding experience for baby. EASY TO HOLD - Evenflo Feeding’s classic and iconic shape now has a fun, ergonomic twist! These uniquely shaped Classic baby bottles are incredibly easy to hold while feeding, ensuring both you and your little one are comfortable. EASY TO CLEAN - Designed with only 3 pieces, the Classic Baby Bottles can be easily assembled and disassembled for a quick, thorough cleaning between feedings. And because there are only a few parts, there is nothing extra to worry about misplacing. These bottles are also dishwasher safe (top rack only), making your busy life a little easier. PUMP DIRECTLY INTO YOUR BABY BOTTLES - Breastfeeding and pumping can be a time consuming task and as a mother you have things to do. Pumping directly into your Classic Baby Bottles is convenient and our bottles will fit onto most standard neck breast pumps. BPA FREE - You’re committed to your child’s safety and so is Evenflo Feeding. Their baby bottles are 100% free of BPA, polycarbonates, PVC, and phthalates, and are constructed of food grade materials.