A 400mL vacuum insulated and reusable water bottle fashionably designed with sustainably-sourced bamboo that you can bring in your everyday eco-friedly adventures. This Lakbawayan™ tumbler, a bamboo tumbler from The Bamboo Company, with a capacity of 400mL is BPA-free and with high quality stainless steel keeps your water cold up to 36 hours and your water hot up to 12 hours.