Usage Directions / Dosage: Before first & after every use, wash & rinse thoroughly. Dishwasher safe - food colourings may discolor product. Sterilize using steam sterilizers or boil for 5 minutes. Before each use, inspect & throw away at first signs of damage or weakness. For hygiene reasons, we recommend replacing after 3 months. Keep in a dry covered container. Do not leave in sunlight or heat when not in use or for longer than recommended in sterilizing solution as this may weaken the product. Never use nipples as a pacifier. Always check food temperature before feeding. Use under adult supervision. Continuous/prolonged sucking of fluids will cause tooth decay. Use clear Avent nipples with Avent Reusable/Natural Feeding Bottles & VIA Feeding System/Nurser.