The Ozark Trail Tumbler is a 30 ounce, double-walled, vacuum-sealed tumbler that is great for both hot and cold liquids. There are two other sizes available—20 ounce and 12 ounce.

The Yeti is considered the "original" tumbler and costs around $40. The Orca Chaser, a 27 ounce tumbler costs between $30-$35, and the Ozark Trail 30 ounce tumbler is sold at Walmart for $9.74.

Available in two sizes (20-ounce and 30-ounce), the Ozark Trail vacuum stainless steel tumbler ($7.74-$9.74, Wal-Mart) is a double-walled and vacuum-sealed tumbler designed to help keep drinks hot ...

The Ozark Trail 30 ounce tumbler -- the least expensive of the three. I bought this one for the challenge because it was so much cheaper than all the others.