Made of non-toxic food-grade quality silicone rubber. Wide soft silicone rubber teat is shaped like natural breast nipple to provide your baby with the comfort and familiarity.Available in 5 sizes (Small, Medium, Large, Extra-Large & Multi-Flow). Japlo Baby Products have complied with Halal requirements according to Islamic Laws. It shows that our manufacturing process for the products safe for worldwide Muslim utilization and consumption Special valve to help prevent gas build-ups and stomach discomfort. Retain clarity after sterilizing and are nitrosamine free.