Step 12: Add the Lights
Insert the first bulb on the string into the hole in the base of your bottle. Continue to feed the lights and cord through the hole, one at a time. On the second and subsequent lights fold the bulb against the cord and gently push through the hole. Take care not to nick the cord.
Once you've gotten four or five bulbs in the bottle, use the 12-inch piece of coat hanger to fish the first bulb on the string out of the bottle. Then, continue feeding bulbs into the base, pulling the light string out of the top of the bottle. This makes it easier to feed the string into the bottle.