It don't take to long to make and the cost if you don't facter in the cost of the water less then a buck.
Step 1: Gather up all your equiptment?
first you need a sharp knife of some sort. I used a box cutter.
A pair of needle nose pliers.
You might need a small drill with a bit. I used a cordless because I can can control the speed better.
parts needed are:
a battery operated tea light. Picked them up at the local buck or two store for 2 for a buck.
a short piece of wire, use sold wire if you can find it, or string if you want.