The husband and wife founders of Pura Stainless Steel came to it by accident, through the constant, fruitless search for a bottle they felt was safe enough for their family to use. And so, they designed the Pura range, uniquely designed to fit from infancy to adulthood, changing only the mouthpieces. Made of medical grade silicone and completely non-toxic stainless steel, Pura is safe for your kids, and safe for you.