You probably have a can of it somewhere. Save the time searching, pick up one of their limited edition twin packs, and finally fix that squeaky door that's driving everyone crazy.

WD-40, with its 2,000+ different uses, is currently available in their original 1950s can of black and yellow for their Now & Then promotion. If you don't need any, give it to grandpa as a reminder of the simpler times. [WD-40 via CrunchGear]