Nane silicone teat is made of non-toxic food-grade quality Liquid Silicone Ribber (LSR Germany) for baby feeding bottle. this teat has a regulated *anti-colic device and is shaped like natural breast teat ti provide your baby with comfort and familiarity. It can be reserved for comprehensive cleaning and retains clarity after sterilizing. It is suitable and fits nicely into any standard and wide-necked feeding bottles. *Anti-colic : Anti Colic teat lets air into the bottle as your baby sucks. this stops the teat from collapsing, enabling him to get a steady stream without gulping air.