The central thin neck design ensures the natural growth of the deciduous teeth, provides space for tooth development, and prevents deciduous teeth from shifting. The corners of the mouth are fitted with radian design, and the top is designed with arc-shaped design. The size and curve of the mouth are fitted with the corners of the baby's mouth, which does not affect the baby's breathing. BPA Free How to use: Before first use place the pacifier in boiling water for 5 min, allow to cool, squeeze out any trapped water from the pacifier. This is to ensure hygiene. Remove any water that may have entered the teat be squeezing the teat. Clean before each use. Pacifiers and caps are suitable for all commonly used forms of sterilization. Wash in warm soapy water and rinse thoroughly. Dishwasher safe, in the top rack – food colorings may discolor components. DO NOT sterilize the display case. Caution & Warnings: Inspect carefully before each use. Do not leave pacifier in direct sunlight or near a source of heat, or leave it in disinfectant for longer than recommended, this may weaken the teat. Inspect before each use and pull the nipple in all directions and replace immediately at the first signs of damage or weakness. Ingredients: BPA-free. Specially selected silicone that is gentle and soft for the baby.