The Evenflo Feeding Classic Prints Standard Bottle features cute designs that will make you go ‘awe’. The included Classic Slow Flow Nipples are 100% silicone and feature micro air vents to help prevent nipple collapse. The nipple has a gradual transition between nipple length and base to allow your baby to maintain their latch. The Classic Prints Bottles have printed measurement markers in both ounces and milliliters to provide an easy and accurate way to measure the volume of liquid. These dishwasher-safe bottles (top rack only) are compatible with all Evenflo Feeding breast pumps, as well as most other standard neck breast pump brands.