The Avent 2 Teats Natural Response 6M+ is a product designed for babies 6 months and older. These teats are designed to mimic the natural shape and movement of the mother's breast, making the transition from breast to bottle easier. To use this product, simply place the nipple on the bottle and make sure it is snug. Then fill the bottle with the desired milk or liquid and offer the bottle to the baby. It is important to follow the manufacturer's cleaning and sterilisation instructions to ensure the safety and hygiene of the product.