This product is dishwasher safe. Do not place the product in a heated oven. Do not bring the cup parts in contact with or place on surfaces with abrasive or antibacterial cleaning agents. We recommend replacing spouts every 3 months. Keep spouts in a dry, covered container. Do not leave a feeding teat or spout in direct sunlight or heat, or leave in disinfectant (sterilizing solution) for longer than recommended, as this may weaken it.