Grosmimi PPSU Olive Straw CUP 200ml (Pistachio)Suitable from 6 months+, one bonus set of weighted straw included + cut straw teat prevents any leakage from the bottle. Air valve prevents backflow due to differences in temperature and pressure inside and outside the bottle. Caution Always use this product with adult supervision. Never use straw teats as a soother. Continuous and prolonged sucking of fluids will cause tooth decay. Always check food temperature before feeding. Inspect before each use