Hot n Cold Water Bottle - Water, Coffee, and tea can be kept hot/cold for 4-8 hours. Made of SUS 304 Stainless Steel. It is safe and corrosion-resistant. Made of BPA Free food-grade material with excellent thermal insulation performance. Thermos vacuum insulation technology and double insulation materials used to maintain temperature for a long time. Compact slim design, Super finish, Outer layer made of bamboo with elegant carving pattern, Anti-Skid bottom. Easy to carry, Fits well in travel bag side pockets, school bag side pockets, standard cars cup holders.