Amazon offers its Prime members the Zojirushi 16-oz. Stainless Steel Mug in Dark Cocoa, model no. SM-KB48TM, for $25.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.74.) That's the lowest total price we could find by $13, although we saw it in a different color for pennies less in November. It features vacuum insulation that keeps beverages hot or cold for hours.

This item will ship in two to five weeks.