Pringles :)

"I think Pringles' initial intention was to make tennis balls. But on the day that the rubber was supposed to show up, a big truckload of potatoes arrived. But Pringles is a laidback company. They said "Screw it. Cut em up." from the late comedian Mitch Hedberg. (Strategic Grill Locations and Mitch All Together)

from http://www.binarywolf.com/249/ a site which shows you how to make a DIY wireless antenna using a Pringles tin! Yes , I do have too much time on my hands :)