Get this Ozark Trail 40 oz Vacuum Insulated Tumbler for $14.97 at Walmart. While this isn't a price drop, this tumbler is often referred to as a dupe for the popular Stanley tumblers which cost $25 more. There are five colors to choose from. This tumbler is BPA-free and can keep drinks cold for up to 25 hours. Please note that only the colors Black, Purple, and Gradient are currently available for shipping. Shipping adds $6.99 or is free on orders over $35.