The Avent 2 Natural Response Teats T2 0M+ is a product designed for feeding babies from birth to 2 months. These teats are designed to mimic the natural shape and movement of the mother's breast, making the transition from breastfeeding to bottle feeding easier. To use this product, simply place the nipple on the bottle and make sure it fits snugly. Then fill the bottle with breastmilk or formula and offer the bottle to your baby. It is important to follow the manufacturer's cleaning and sterilisation instructions to ensure the safety and hygiene of the product.