Elegant slim design 500ml stainless steel vacuum double wall drink bottle with filter, featuring an eco-friendly sustainably sourced natural bamboo outer wall. It has a touch LED temperature display lid which will show the inner temperature with a range of 9°C to 98°C, 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 and 100% BPA FREE. It is not dishwasher and microwave safe, handwashing is recommended. Do not place dry ice, carbonated drinks etc, also do not leave the bottle in fridge or freeser, store it in a dry and ventilated place. The natural bamboo does produce variances in colour, grain pattern and branding. Please note: the battery inside the lid is not exchangeable and its lifetime can be more than 3 years(assuming the display is lighten up about 20 times a day). 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.