Step 1: Collect your utensils
You will need:
Large size soda bottle
Exacto or other blade knife
String, chain or wire for hanging
Step 3: Cut at the seam
If your seam is very close to where the ridges form, that draw a line around the bottom, at least an inch away from where the ridges start. It is VERY important that the ridges be well intact to the now cut off bottom part.
Now the body of the bottle chould be cut and seperated from the bottom.
Step 4: Insert removed bottom
The bottom will create a resevoir that will hold water, a little more than a cup I think.