Amazon offers its Prime members the Thermos Foogo Leak-Proof 10-oz. Stainless Steel Food Jar in Blue or Pink for $13.99 with free shipping. (Non-members can spend over $35 for free shipping; otherwise, it adds $5.52.) That's the lowest total in-stock price we could find by $10, although in February we saw it for $2 less. This double-wall vacuum-insulated food jar purports to keep contents cold for seven hours or hot for five hours.