So the goal of this project was to create centerpieces from empty glass bottles. The idea is to use the bottles as vases, which means cutting the bottle. This involved some trial and a lot of errors.
If you do this, please use safety glasses, work gloves, common sense. Have a sink full of water and make sure that the fire extinguisher is on hand. After cutting, the edge is really sharp. Since these are purely ornamental and we don't plan to touch them, we are forgoing the sanding step. No one was hurt during this project.
Sunday Feb 12 - trial 1: using fire to score the bottle.
http://www.youtube.com/watch?v=yHWYjMlYH50
Basically soak a piece of twine (I used crochet yarn) in acetone (I used 70% rubbing alcohol), and tie the twine around the bottle. Set the twine on fire to "score" the bottle. Then drop the bottle in a sink full of cold water. Tried this with a beer bottle (yes, I tried it with the label on). It worked!
Saturday Feb 18 - trial 2: proceed with a wine bottle. Tried three different kinds of wine bottles and relighting the twine several times. Nothing. This wouldn't even score/crack/scratch the bottles. Bummer :(
Sunday Feb 19 - trial 3: bring in the big guns. Well, I went to Micheal's and bought their bottle cutter kit (I had a 50% off coupon from the Sunday paper, and a gift card). The kit has a glass cutting blade on a stand to score the outside of the bottle, and a metal bar that you insert inside the bottle and hit the bottle at the score line from the inside. Tried it on one wine bottle. It worked! Yay!
This is the bottle cutter. Yes, that is a 15 ml Falcon tube. It contains mineral oil. The instruction said to use any household oil (but not cooking oil) between two cuts. Mineral oil is a household oil right?
Monday Feb 20 - trial 4: uh oh. The metal bar did not want to go in the other types of bottles. We tried putting the bottles in hot water and then in cold water after scoring it, but to no avail. Bummer :(

This is the metal bar. The loop at the bottom is the part that you use to hit the bottle. It is also the part that will not fit through the neck of some bottles.
Sunday Feb 25 - trial 5: The idea is if the tool didn't work, I would return it and scrap this project. I scored the bottle with the tool, then used a candle to heat the bottle at the score line. Then I ran some tap water on the score line and it worked! Yay!
I cut all the bottles that I had in the house (only greenish and clear ones) in less than 2 hours. In Part 1, there were the champagne bottles that had residue that would not come off the bottle. I cut those as well. I figured I could use some pretty ribbon or scrapbook paper to go around the bottles and hide the residue.
Next trial: This technique produced some sharp and rough edges. Most of the time it happened when I heated one spot too long and it stressed the bottle beyond the score line. I just saw a YouTube tutorial (
http://www.youtube.com/watch?v=sFXngPx3w3M)where after scoring the bottle, you pour hot water on the score line and then run cold water. This produced a smooth edge.
Also, the glass cutter does not produce one continuous score line. I guess that will come with practice. There two models of bottle glass cutter, one at Hobby Lobby and the other at Micheal's. From the YouTube tutorial, it looks like the Hobby Lobby one might be the better tool. Oh well.
Overall, I'm pretty pleased with this.
Tom has to give his approval - he may request that I sand down the edges.
I may say no.