Use: The NUK First Choice+ latex teat is designed for infants aged 0 to 6 months and has a medium flow, suitable for milk and formula. It is designed to mimic the shape of the mother's nipple during breastfeeding, promoting proper development of the baby's mouth, lips, and tongue. The teat has an orthodontic, asymmetric NUK shape, a wide lip support, and a very soft tip. The integrated NUK Air System anti-colic system allows air to enter the bottle through an improved valve, preventing the baby from swallowing air and helping to prevent colic. The teat is suitable for mixed feeding. How to take: During feeding, the teat should be completely filled with milk. It is important to burp the baby during and after feeding. Contraindications: For safety and hygiene, it is recommended to replace teats after 1-2 months of use or at the first signs of wear. It is not recommended to sterilize teats in a dishwasher, as this may damage the material. Also, do not heat or use a microwave oven to sterilize these teats, as this can damage the latex and create a potential choking hazard. For people with a latex allergy, silicone teats are recommended. Storage: Before sterilization, it is recommended to use a NUK baby bottle cleaner to more effectively remove milk protein, pulp, and juice residues than just hot soapy water. For sterilizing bottles and teats, steam or cold water sterilization, as well as a NUK steam or microwave sterilizer, is recommended. The product is supplied sterile, individually packaged, and ready for use. Store in a clean and dry place.