Lighted bottles

I used LED Xmas lites to place into liquor or other bottles for decorative appeal. I have a large clear vase with 60 mutli colored lites, and a etched brandy bottle on my fireplace mantle in my front room.  http://i299.photobucket.com/albums/mm299/ragdolldude/vase.jp g shows one of them. I find it relaxing to work on these. These LED lights run cool, lose a lot less electricity than standard mini lights.  I've made about 30 of these in the past year, and suprisingly I've not broken one bottle when drilling a hole for the electrical cord. I just ordered some remote outlets from a shopping channel. It has a master remote, that controls 4 different electrical outlets. This will make it convenient to turn off lights without fumbling behind furniture to find inline switch or unplugging extension cords. DAVE

Those are beautiful. You could sell these! I would love to make one with clear lights within a cobalt blue bottle but am afraid drilling into glass would be beyond my abilities. Would you mind sharing how you do the drilling? Is it a special drill bit?