Elegant slim design 450ml stainless steel vacuum double wall drink bottle with filter, featuring an eco-friendly sustainably sourced natural bamboo outer wall. It has an option of 3 type of lids: no handle, rope handle, and steel wire handle. It is leak-proof and can keep hot for at least 4hrs-8hrs and cold for 24hrs. The inner wall is 304 food grade stainless steel and 100% BPA FREE. It is not dishwasher and microwave safe, handwashing is recommended. Do not place dry ice, carbonated drinks etc. The natural bamboo does produce variances in colour, grain pattern and branding. This bottle is small enough to carry around, they can fit into totes, bag packs, and most car cup holders, it has large capacity, suitable for carrying a variety of coffee, hot water and ice water to meet your daily drinking needs, is a great promotional product to display your logo and get your message across.