This 32-ounce bottle is standard-sized for active folks, with a wide mouth opening. But that's where similarities to your typical water bottle end. The Hydro Flask is lined with non-porous stainless steel, which will not gather bacteria or taste like last weekend's Gatorade, and double-wall insulated to keep drinks at temp longer.These products come with Hydro Flask's new Flex Cap top. Designed for portability, this top is easy to carry and insulated. You must twist and remove the entire cap to drink (there is no pour spout). You can purchase the Wide Mouth Hydro Flip Cap and the Wide Mouth Straw Lid separately.