Just what the title says! Be green and save a bottle from the trash! Convert it into a high-tech-24-hour-home-banking-ATM!
You only need al container with nothing in it. I used a Vitamin Water bottle.
Step 1: Press start to begin.
Screw the cap off, and put a tad bit of water in the bottle. Put the cap back on, and swish it around. Dump the water out and dry out the bottle. Then, simply put the coins in and start saving up!