Walmart offers the Ozark Trail 30-oz. Stainless Steel Tumbler in six colors (Stainless Steel pictured), model no. 83-492, for $9.74. Opt for in-store pickup to avoid the $5.97 shipping fee. That's tied with our mention from a month ago and the lowest price we could find by $3. This BPA-free tumbler is double-walled and vacuum-sealed.