Durable Construction: Every Day Use Tumbler Made from high-quality kitchen-grade stainless steel, ensuring resistance to rust, corrosion, and impact. Built in Straw and Strawhole with rubber stopper for use with your favorite straw Double-Wall Insulation: Mammoth 20oz Stainless Cup keeps beverages at the desired temperature for extended periods, maintaining ice for up to 36+ hours and keeping liquids hot for up to 12+ hours Spill-Resistant Lid: Features a secure, spill-resistant lid to prevent leaks, making it ideal for on-the-go use. Capacity: With a generous 20 oz capacity, this tumbler ensures you have enough of your favorite drink to keep you hydrated throughout the day. Portability: Designed to fit most cup holders, this tumbler is perfect for those who are always on the move. Whether you’re commuting, traveling, or running errands, you can easily take your drink with you. Warranty: Backed by a lifetime warranty, the Mammoth Ascent Tumbler offers peace of mind. You can trust in its quality and durability, knowing that it’s designed to stand the test of time.