Premium Stainless Steel – Made from high-quality, stainless steel for durability, safety, and long-lasting use. Rust-resistant and odor-free.Hot amp; Cold Insulation – Double-walled vacuum insulation keeps beverages hot for up to 12 hours or cold for up to 24 hours.100% Leak-Proof Lid – Secure seal prevents spills and leaks, making it perfect for bags, backpacks, and travel.Built-In Cup amp; Handle – Detachable cup lid allows for easy pouring and drinking. Convenient handle for carrying anywhere.Family-Friendly Design – Safe and convenient for children, babies, and adults alike. Great for school.