This Project is based off of Scooter76's Cool LED Night Light.
Besides drilling the bottle which quite a while since I was trying to be careful not to shatter it, the circuit part of this project only took about 20 minutes. When you are drilling a glass bottle make sure that you use a special glass drill bit and that you go slow and don't apply much pressure. Take a break every 30 seconds or so and brush the glass dust away, I used an air can made for computer dust. Always wear proper protection such as Safety glasses and proper face mask to make sure that you don't inhale the fine particles.
Step 1: Tools Needed
Glass Drill Bit
Step 2: Drill a Hole
Here you drill a hole in the back of your bottle and then feed the power adapter wire through the hole and out of the bottle so you can work on it.
Step 3: Switch and Resistors
Here you are going to solder 2 wires to the switch, one on each lead. Then on one of the leads, attach the 2 100ohm resistors. For 2 LEDs, you need roughly 180ohms of resistance. I used 200 because I had a couple 100ohm resistors laying around. You can always use more resistance but never use less, otherwise you will end up blowing your LED bulbs. I finished it off with adding some shrink wrap to cover the connections and to protect it.
Step 4: Completing the Circuit
Here you have to set up the wiring to the LEDs. Connect the positive lead from one LED to the negative lead from the second LED, solder them and apply shrink wrap. Then from the power adapter, apply the positive wire from the power adapter to the positive side of the LED circuit. Attach the Negative wire from the power adapter to one of the wires leading up to the switch. Attach the other wire from the switch to the negative side of the LED circuit and now you have a completed 2 LED light switch. Test it to make sure it works then heat all the shrink wrap down to protect and cover the soldered connections.
Step 5: Finishing Up
Just put the wires and LEDs inside of the bottle and screw on the top using the original threads from both the bottle and the cap. Plug in the power adapter and press the on button on top of the bottle and see it light up.
Very simple and looks great!