Simplest Light Beam Ever Made

You don't need to buy any thing at all ;) I bet you already have everything i.e you need the following:

1) You need a torch light (you can use your cell phone's torch)

2) A transparent bottle full of water.

That's it!!!

Step 1: The Picture Says It All

I used my cell torch light and captured the picture from another cell phone. Isn't it easy?