Procizion via Amazon offers Prime members the Procizion Insulated Stainless Steel 16-oz. Thermos in four colors (Silver pictured) for $19.97 with free shipping. (Non-members can spend $49 to qualify for free shipping; otherwise, shipping costs $6.55.) That's $40 off list and the lowest total price we could find. It purportedly keeps beverages hot for a 12 hours or cold for 24.