Klean Kanteen Stainless Steel Bottle with 3.0 Sport Cap Made of 18/8 food grade stainless steel, no liner needed No BPA, phthalates, lead or other toxins Doesn't retain or impart flavors for a clean, fresh drink every time Rounded corners are easy to clean with no hard angles where dirt, germs or other bacteria can stick New Sport Cap 30 made from BPA-free polypropylene ensures a smooth even flow of liquid with no "chirping"