Description: 500ml BPA free vacuum insulated double wall stainless steel flask, it has a screw on silver stainless steel lid and push button operation, keeps hot for 12 hours and cold for 24 hours, matt black finishing and laser engrave to a natural silver colour. This flask is not dishwasher safe, handwashing is recommended. Product Size: 80 mmW x 28 mmH x 41 mmD. Packaging: White Paper Box or Optional Gift Tube. Colours: Black