Amazon offers Prime members the Contigo Autoseal West Loop 16-oz. Travel Mug in Black, model no. 21325, for $11.57 with free shipping. (Monaco is available for about the same price. Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $6.37.) That's tied with last month's mention and the lowest total price we could find by $9. It features double-wall, vacuum-insulated stainless steel that keeps beverages hot for four hours or cold for 12 hours. The lid is made of BPA-free plastic.