Ozark Trail 30-Ounce Double-Wall, Vacuum-Sealed Tumbler (Green) for $5.00

Ozark Trail 30-Ounce Double-Wall, Vacuum-Sealed Tumbler (Green) for $5.00.  Order online for in-store pickup at Walmart to lock in the price and save on shipping.  Otherwise, shipping is free for orders over $35.  It works with both hot and cold liquids, and is made of double-walled stainless steel.  Most places have it for about $16.