Cut Glass Bottles Using a String




There are so many uses of glass bottles from containers to drinking glasses. This instructable will sow how to cut a glass bottle using a string and some fire magic.

Hope you enjoy this and it helps you in your future projects

Please vote for me the string contest....

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Step 1: Materials Needed

The required materials are

  • Glass Bottle
  • A piece of string or yarn. Yarn works better.
  • Lighter
  • Acetone (Nail Polish Remover) or lighter fluid
  • An ice bath
  • Sandpaper or a nail file

Step 2: The Process

1. Tie the string around the bottle rotating it about 4 to 5 times. Tie a tight knot and cut off the excess string
2. Now remove the string from the bottle and dip it into acetone or lighter fluid. Allow it to get fully soaked.
3. Slide the string back onto the bottle.
4. Get the ice bath and above it light the string using the lighter. Rotate the bottle as the acetone burns for even heating.
5. Let the acetone burn off and then immediately dip the bottle in the ice bath.
6. The bottle should break into two pieces giving you an okayish cut.

Step 3: Now What to Do

So you have cut the glass bottle and now you're wondering what you can do with it. Well there is alot that you can do.

1. Sand down the rough edges using a grinder or sand paper. A grinder would be more efficient. You can now use this as a drinking glass or a container.
2. Make the cut at a lower height in the bottle and use the above portion as a decorative candle holder..
3. Lights: just cutting back the bottom of the bottle, and pass through electrical equipment and electrical cords in different lengths
4. A table lamp by larger decorative bottles that will make removing the lower part is to pass the cable and to adjust a cloth hat in the neck of the bottle

The possibilities are endless. Let's see what you can make of it......

Please vote for me in the string contest.

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    11 Discussions


    3 years ago

    Is it possible to take alcohol ethanol instead of acetone?

    2 replies

    Reply 3 years ago

    I haven't tried it with ethanol but it technically should work. Just saturate the string with ethanol well enough.


    Reply 1 year ago

    HI Siddak, so the string does not have to be tied tightly. It can be loose. And then when i put it in the ice bath it will break the same way as a straight cut?


    1 year ago

    Is there a way to cut the glass at an angle?


    3 years ago

    Is there some reason one shouldn't soak the string/yarn in the acetone first? Seems like it would be easier to tie on soaked string than removing, soaking, & struggling to get back on... ?

    2 replies

    Reply 3 years ago

    I don't think you should soak the string while on the bottle because you might get the flammable liquid on the entire bottle, causing a fire hazard. If it drips down to where you're holding the bottle, you could badly burn your hand.


    Reply 3 years ago

    If you put the string on first you can measure the string out and make the loop to size. Then sliding it back on is not much of a deal. Soaking it first might look convenient but you'll squeeze out some of the acetone while doing it. It can be tried the method is not written in stone.


    3 years ago

    what are the odds of this being a clean break instead of a gnarly mass of shards?

    was it consistent results?

    3 replies

    Reply 3 years ago

    I tried it a few times and results were fairly consistent. It always broke into two pieces but the break line was very bad in one. If you place the string straight and do it all correctly you will get an okayish cut, which can be improved by sanding.


    Reply 3 years ago

    I've done this a few times before.. it's fairly consistent, the hardest part is finding a string that can soak up your fuel, and making sure the string is straight on the bottle. once you've cracked it take some 200 grit sandpaper and smooth off the edges.