Walmart offers two Ozark Trail 30-oz. Tumblers in Stainless Steel for $9.24. (Be sure to select this color option to get this price.) Opt for in-store pickup to avoid the $5.99 shipping fee. That's tied with last week's mention and the lowest per-unit price we've seen. (It's also the best deal we could find for this quantity today by $15.) Each BPA-free tumbler is double-walled and vacuum-sealed.