saw these for $4.50. I prefer the 40 oz to the 30 oz. good price. ymmv. At some locations as low as $3.00
Ozark Trail 40 oz Vacuum Insulated Stainless Steel Tumbler
http://www.walmart.com/ip/Ozark-T…r/54304694
https://brickseek.com/walmart-inv…u=5430469