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How to Cut Glass Bottles in Half Using Fire and Glass Cutters or Acetone-Soaked String

Illustration of various bottles, a candle, and a bucket with tools.

Want to make your own glass drinking cups? You don't need to be a glassworker to get creative. Just recycle some of your old beer, soda, or wine bottles into stylish toothbrush holders or glass cups.

You can tie a loop of string that was dipped in nail polish remover around a glass bottle of choice, then set the string on fire with a lighter. Then just submerge the bottle in a sink of cold water and gently snap the bottle into two separate pieces.

If you have a glass cutter and some kind of support that can hold the glass bottle horizontally in place, you can mark where you want to cut the bottle. Use a lit candle to heat the marked line five to six times, then submerge it in cold water and tap on the glass to separate it into two separate pieces.

Click on image to enlarge.

How to cut a plastic bottle with a candle: step-by-step instructions illustrated.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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