Cool, Cheap, Easy! Costs less than a penny!
Step 1: Materials
Materials needed: Squash tape ( Or any other tape), two rubberbands and a paper tube formed by rolling several pieces of paper together.
Step 2: Folding
Fold the paper or plastic tube into half, making a U shape, like seen in the picture
Step 3: Taping
Tape the rubberbands onto the U shaped paper tube, as shown in the picture.
Tape the two rubberbands together and you're done! The picture shown will be your end-product