Food Grade Stainless Steel: Made of high quality premium 304 food grade stainless steel with double-wall vacuum insulation coffee mug, more durable, and ensures the cup remains odor-free,and keep your drinks will stay nice cold for up to 12 hours, and hot up to 6 hours. Leak-Proof Lid: Tumbler adopts newly upgraded double-threaded twisting design, keeps the cup completely sealed and sweat-proof. It is easy to handle the shakes and bumps of sports or car travel. Special Gift: This stainless steel mug is perfect for outdoor activities, picnics, camping, or people who work or drive for a long time. Suitable for those who love outdoor activities or need to keep warm for a long time, it is a practical and high-quality gift choice. Suitable for Mothers Day, Fathers Day, Christmas, friends birthday gifts. Super Capacity Travel Tumbler: This large tumbler can be safely placed in most car cup holders, no worries when traveling far. Tumbler also has a humanized design straw and handle, easy to drink directly or through a straw. Lifetime Warranty - We are committed to providing rugged and powerful food and beverage gear with accessories that last a lifetime. Let you rest easy because we''ll always have your back.