Wide mouth for easy filling and pouring Made of 18/8, food-grade stainless steel, no liner needed 100% stainless interior (18/8 stainless caps) BPA-free & eco-friendly Doesn't retain or impart flavors Slim design fits in most cup holders Rounded corners are easy to clean with no hard angles where dirt, germs or bacteria can stick Stainless steel threads Works with standard backcountry water filters Capacity: 18 fluid ounces (532 ml) Weight: 4.625 ounces (w/o cap) Size: 6.5” H (w/o cap) x 2.75” W Opening diameter: 2.125” (54 mm) Made of 18/8, food-grade stainless steel, no liner needed Reusable & 100% recyclable