Step 1: Supplies
1. Several empty plastic soda bottles with the "flower" type bottom.
2. At least one of your bottles's side should be completely smooth. Avoid bottles that have bumps or ridges as they will only get in the way. For this, I suggest using Nestea bottles.
3. A thumb tack
4. clear tape.
5. A strong pair of scissors
6. A serrated knife.
7. A dry erase marker or sharpy