Stainless Steel Vacuum Travel Thermos Set for $7.99. Select in-store pickup at Kmart to save on shipping. Otherwise, shipping is $6.50 for a total of $14.49 shipped. Here is a screenshot for reference. This set includes one-16oz vacuum flask, two-15oz stainless steel travel mugs, and a zippered travel pouch with convenient strap. Most places have it for about $13.