Evenflo Classic Bottle Nipples, 12 Count, Fast Flow

Each package includes four natural silicone nipples. The Slow Flow Stage 1 nipples are for 0+ months. The Medium Flow Stage 2 nipples are for 3+ months. The Fast Flow Stage 3 nipples are for 8+ months. As your baby grows, you can replace the Stage 1 nipples with faster flow ones. Micro Air Vents allow air to return to the bottle, preventing nipple collapse and keeping air out of baby's tummy. Sensitive Response nipples are soft and flexible; and they adjust to baby's pressure while suckling for the proper flow of liquid. This is for a 12 pack of fast flow