We highly recommend our eco-friendly BPA-free stainless steel water bottles made from high-quality food-grade non-toxic stainless steel. These non-breakable and non-leaching bottles by Klean Kanteen are an alternative to plastic bottles and are healthy for both you and the environment. No plastic lining is required for stainless steel, as is the case for aluminum bottles. Studies show that some plastic water bottles, as well as the plastic lining in aluminum water bottles, leach bisphenol A (BPA) which mimics our own naturally occurring estrogen and is therefore an endocrine disruptor and a dangerous health risk. Klean Kanteens have a large opening makes them easy to clean and they are rugged, light weight, and convenient to carry. The Kanteens fit nicely into most vehicle's cup holders. All 4 different styles of caps are made from durable non-leaching polypropylene #5 and are interchangeable with any of the water bottles. Klean Kanteens are a product of exceptional quality responsibly made in China. Laboratory testing assures product safety, and high standards at the production sites assure that the workers making this product are being well treated and are earning a fair living wage. Choose from Flat, Sport, or Loop drinking tops which fit any of the Klean Kanteen water bottles. The bottles are 100% recyclable and are dishwasher safe. Please choose a cap style and a color: Stainless Steel, Moss, Sunset, Ocean, Black, Pink, Tree Bark, and Red.