This video is truly amazing and it shows you how to turn your old beer bottles into glasses in a matter of seconds. He starts by making a mark on the glass with a bottle cutter to score the edge. He does this just above the label and this is how tall the glass will be. He then takes some boiling water and he pours the water over the score line on the glass. After boiling the glass, he then runs it under some cold water right after. He does this a few times, and that is when the magic happens.
The glass cracks in half, right on the line he scored earlier and it really is a great sight to see. He then takes some sandpaper and he smoothes down the edges of the glass, and before you know it, he has a solid drinking glass that is smooth and decorative. What an amazing video!