For in-store pickup only and with stock varying by ZIP code, Walmart offers the Sterno Canned Heat 2.6-oz. Entertainment Cooking Fuel Can 3-Pack, model no. 20230, for $4.36. That's the lowest total price we could find by $3. Each can burns for up to 45 minutes and can be used to cook meals or keep food warm. It can be used with camp stoves, fondue pots, chafers, buffets, and drink urns.