Promotional Stainless steel double walled vacuum flask (500ml) Crafted for both style and function, our 500ml stainless steel vacuum flask epitomises the harmony of utility and sophistication. This flask, engineered with a double-walled construction, is designed to keep your beverages at the ideal temperature for hours, whether it's your morning tea piping hot or your refreshing juice chilled on a warm day. This flask is an ideal choice for corporate gifts or promotional items, offering a daily reminder of your brand's presence. Not dishwasher safe.