Mainstays 40 oz Double Wall Stainless Steel Bottle is a highly insulated, reusable hydration flask designed to keep drinks cold or hot for extended periods. It features a large capacity for all-day use, durable food-grade stainless steel construction, and a sweat-proof, condensation-free design.
These bottles are available in various styles and colors (including black, pink, and purple) and generally feature spill-resistant lids, such as chug, flip-top, or screw-top caps.