Amazon offers its Prime members the Thermos Foogo Insulated 10-oz. Stainless Steel Food Jar in Watermelon/Green for $12.90 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.25.) That's the lowest total price we could find for any color by $7, although we saw it for a buck less in October. This double-wall vacuum-insulated food jar purports to keep contents cold for seven hours or hot for five hours.