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.
Step 2: Preping the bottle
Step 3: Cutting Flap part 1
About 1 1/2 inches long. (I'm from the old school not to good at converting to metric.)
I choose to cut it in the smooth part. A lot less resistance there after all the knife is sharp.
Step 4: Cutting Flapp part 2
do not cut a cross the top. we are just making a flap here.
The reason for this is that unless you look closely it's almost invisible. If you cut it all out you have a hole, Not very attractive.
Step 5: Prepping the top
Take of the top and drill a small hole in it to fit the wire through.
Step 6: Wire
Form a very small loop at the end that goes in the bottle.
Form a bigger loop at the top.
if you use string feed both ends of the string through.
tie a big knot so it don't slip out.