Liquids touch only glass & silicone. Angled neck supports healthy digestion. 0 + months. X-cut variable flow nipple. Glass helps avoid harmful chemicals. I am glass, silicone & plants! family of brands for your baby's well-being. Baby bottle made from glass with silicone cover flexible nipple design stretches for continuous latch, similar to natural nipples, drip-free, x-cut, variable flow nipple helps baby instinctively regulate flow angled neck supports healthy digestion & is comfortable to hold, wide neck for easy filling & cleaning, examine all parts regularly for damage. Glass & silicone are non-petro materials. Sprout ware is a plant-plastic (pla) that reduces the risk of leaching petro-plastic chemicals & microplastic pollution. Sprout ware. Plant-plastic travel cap & collar. Silicone nipple. Glass bottle inside. Silicone cover. Food safe. Please recycle packaging. country of origin : usa, north carolina size : 1 ct pack of : 1 selling unit : each