10). Food in a can/fire in a can/tent in a can/can in a can — Madman

9). The telescoping/rotating hotdog/marshmallow skewer that doubles as a survival tool for spearing fish or game. — pineland

8). Duct Tape! designed for air conditioning, but perfect for blisters, ripped tents, broken trekking poles, etc. Besides, if you can't fix it with duct tape, it really isn't broken! — hiker rev, Nancy

7). Tarp. Ever hear of tarpitecture? — Nate

6). Zip Loc bags! To pack in, or haul out, they can't be beat! — Snoopy

5). Hefty Trash Bag Ponchos — Mike P.

4). My own version of dehydrated beer. It tastes like s**t but if you close your eyes and think real hard. — Spalding

3). Travel Battleship. — Birdy1

2). Self cooking food — Tracker

1)."Lady Jay," a funnel with a tube attached that lets a woman pee while standing up — Chickadee, Willa