Walmart offers the Ozark Trail 12-oz. Vacuum-Insulated Stainless Steel Can Cooler 4-Pack for $12. Choose in-store pickup to dodge the $5.99 shipping fee. That's tied with our mention from last month and the lowest price we could find for this quantity by $28. These BPA-free coolers are double-walled and vacuum-sealed and feature a metal screw-on gasket.