You don't need to be an athlete to appreciate the benefits offered by the Sun & Ski Xtreme Water Bottle. These 28 oz. water bottles are soft, easy to squeeze, and are made from LDPE plastic which is widely used as a lining in milk cartons. Comes with a leakproof push/pull cap that covers a 63mm opening which is wide enough for ice cubes to fit in. Made in the USA.