Have some clear
packing tape? Get 2 long pieces and tape a
dollar bill on both sides of the bill. Start a little less than an
inch on the end opposite of the side you put in first:
+-----------------+---+-----------+
| | | |
| Tape | | Bill | Side you place
| | | | into machine 1st
| | | |
+-----------------+---+-----------+
Make sure you have a nice, new, clean bill so you won't get
bubbles or
wrinkles between the tape and bill. Also try to not to get the bubbles between the two pieces of tape. You should now have a
dollar bill with a long
tail of tape coming off the end. Make the
tail at least 4 feet. Now you have a way to get a
can or
bottle of
pop whenever you want (or any other thing that come in
vending machines). Just put the
dollar bill in holding the tape firmly, make your selection, and carefully pull the bill back out. If it doesn't work, you probably have bubbles. If you are sure there aren't any bubbles, then try another machine.
I have gotten this to work on about 10 different machines (every machine I have ever tried). Manufacturers of machines have started making ways to prevent this technique, though, so try older machines first.