Inspired by LJ WoodLe. I managed to go 4 for 6…......make that 3 for 6 because i just knocked one over! I used a cheap lowes glass cuter and some scrap materials. I wet each bottle and put it in the freezer. Once the water boiled i took them out one at a time and poured hot water. The first two failed because the second pass with the cutter made the cut line pretty rough.