I thought I would throw this one in for fun, it is constructed a little differently than my other one, but I think it looks neat. Also could come in handy at some high schools if they make you bring clear bags. This is being entered in the Tap'dNY Keep the bottle Contest. If you haven't yet, Please vote-please vote-please vote! Thanks!
Step 1: Materials needed
First you need:
1. A clear one liter pop bottle
2. Clear vinyl sheeting- 14 1/2 inches by 7 inches
3. A package of clear lacing, like you use for lanyards
4. Clear beads
5. Super glue, if you want to use it for the knots
6. Peanut butter!
a. Some dental floss
b. A hole punch
c. An x-acto knife
d. A cutting board