Chuchu Baby 240ml Nipple for all ages: Includes a nipple that doesn't require size changes from newborn to weaning. It features a "super cross-cut" design that controls the amount the baby drinks according to their sucking strength. Easy-to-wash wide-mouth type: The wide mouth makes it easy to wash and care for. Materials and sterilization methods: Made of durable, heat-resistant glass that resists stains. Compatible with boiling, chemical, and microwave sterilization. Design: Features a simple and stylish border-type scale. Manufacturing: All parts are made in Japan. Used for about 3 days, then sterilized and stored. Please purchase only if you understand that this is a used item. To prevent any problems, please be sure to read the self-introduction. Baby Infant Newborn