Bamboo made bottle is eco friendly with its high quality real-bamboo casing and build quality of Insulated Stainless Steel, best suitable for travellers on the go or to keep on office desk. 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. Wide mouth for ease of use. Leak-proof with airtight twist-on lid. Tea can be directly poured into the bottle via the tea strainer. Note: It is not microwave safe. It can not be washed in dishwasher. For best results, Rinse with hot water to store hot beverages and with cold water before storing cold beverages.