How to Cut a Glass Bottle Using a String

Old bottles can be upcycled into useful household items. Remove the tops of beer bottles and they can be used as drinking glasses. Remove the top of a wine bottle and you can use it as a flower vase. Cutting glass with string is surprisingly easy.

Don't throw them out!

Things You'll Need

  • Lighter fluid or nail polish remover

  • String

  • Bowl of water large enough to hold the bottle

  • Goggles

  • Diamond-coated file

Step 1

Soak the string for a few minutes in the lighter fluid or nail polish remover.

Step 2

Tie the soaked string around the bottle at the point you want to cut.

Step 3

Put on your goggles. Hold the bottle over a fire safe surface and set the string on fire. Allow the string to burn until it burns out on its own.

Step 4

Place the bottle in the bowl of cold water. The temperature change will cause the glass to break.

Step 5

Tap the glass gently with the back of a spoon at the break point (the point where the string is wrapped around the bottle) if it does not break.

Step 6

Smooth any jagged edges with a diamond-coated file. Be sure the glass is wet and well-lubricated when working with a diamond file.


Be sure to have a fire extinguisher nearby when working with fire. Consider wearing fire-safe gloves as well.