Pura Stainless was created with a simple vision - to make a difference by responsibly manufacturing toxin-free, durable, and cost effective alternatives to bottled water and the petroleum-based (ie plastic) reusable bottles and food storage containers. In this day and age there is simply no reason to expose yourself or your little ones to toxin-laden plastics or to contribute to the massive waste problem created by bottled water. All Pura bottles are crafted from #304, also known as 18/8, food-grade stainless steel. Known for its resistance to corrosion and staining, and antibacterial properties, it is perfectly suited for use as a beverage container. In fact, many commercial food transport, storage and preparation products are made of #304 stainless steel due to these properties. And because stainless steel does not react with acidic foods or beverages, it will not affect the flavor of your beverage. Pura bottles are non-toxic and truly 100% BPA-free. All bottles, components, and accessories are independently tested by a leading global testing lab and certified to have no detectable levels of Bisphenol-a (BPA), lead, phthalates or nitrosamines.