We tested eight brands of plastic wrap, including Kirkland Signature, Saran Wrap, and Stretch-Tite. One got gold stars across the board, but many more flunked. Not all plastic wraps are the same—four ...

The slick, transparent film we now know as plastic wrap was originally a mistake of chemistry, a residue clinging stubbornly to the bottom of a beaker in a 1930s laboratory. The military originally ...