Make a statement with this 500ml, nature-inspired double wall flask which has a genuine bamboo outer wall. It has a stainless steel inner wall and its own screw on cup with a smart stainless steel finish. The flask will keep drinks hot or cold for longer and has convenient push button operation. It is BPA-free and is presented in a black gift box. This product is not dishwasher safe and handwashing is recommended. Bamboo is a natural material which produces unavoidable variances in the grain pattern, colour and branding.