Double walled vacuum insulated technology keeps beverages hot for up to 12 hours or cold for up to 24 hours. Made of 304 stainless steel inner coating for better temperature retention. A unique matt finishing 500ml flask that makes pouring completely hassle-free spill-free and rust-proof. A push button operation with no condensation on the outer body even while carrying icy cold water completely sweat-free. Leak proof design. Contains no toxins. Completely BPA and phthalate-free. Three small cups made of stainless steel with plastic handle and outer. All packed into a smooth semi-gloss black cardboard box with a die-cut foam base to hold bottle and mugs. Not dishwasher safe handwashing is recommended.