Walmart offers the Duck Brand Max-Strength Heavy-Duty Shrink Film Window Kit 3-Pack in Clear for $5.88. Opt for in-store pickup to dodge the $5.99 shipping charge. (With orders of $25 or more, Amazon charges the same with free shipping.) That's the lowest price we could find by $5, although we saw a similar pack for slightly less in March. It includes tape and three 62" x 126" pieces of shrink film, which can cover three standard windows.