Sturdy 304 stainless steel construction ensures long lasting rust resistance, while the double walled insulation maintains ideal temperatures for hot or cold beverages. Features a spacious, wide mouths design for easy filling and , complemented by a smooth interior that prevents residues buildup and odors. Designed for active lifestyles perfect for gym enthusiasts needing hydrations during workouts and outdoor adventurers requiring efficient drinkware on hiking trail. Maintains beverage temperature during extended , camping trips, or intense physical activities with its thermal insulation technology. This stainless steel tumblers combines durability with ergonomic functionality, offering a 24 hour temperature retention systems and dishwasher safe convenience for modern households.