Hands Down : Toilet paper Just saying
"Honorable Mentions"...<br />
Sure, VELCRO... but without RUBBER BANDS there would be no tie-dye t-shirts, and without DUCT TAPE there would be no universe.<br />
Sure, the WHEEL... but without the LEVER there would be no slot machines, and without the SCREW there'd be no people.<br />
Sure, TOILET PAPER... but without POST-IT NOTES there would be no today, and without CALENDARS there would be no tomorrow... <br />
(or cute puppies, kittens, Playboy models, views from the Hubble Telescope, or 365-Ways-To-Prepare-Meatloaf.)
penicillin ....I like not dieing from everything the best.
sucks to be you then
Aircraft without a shadow of a doubt. The world today can't work without them.