For your child's safety and health: To prevent choking hazards, check nipple frequently for tears. Discard nipple if there are cracks or tears. This product must always be used under adult supervision. Never use this nipple as a pacifier. Continuous and prolonged sucking of fluids can lead to tooth decay. Always check the temperature of the liquid before using the bottle. Do not leave nipple in direct sunlight or heat or leave in disinfectant (sterilizing solution) for longer than recomended, as this may weaken the nipple.