How To: Cut a Beer Bottle in Half Without a Knife

Cut a Beer Bottle in Half Without a Knife

How to Cut a Beer Bottle in Half Without a Knife

Learn how to cut a beer bottle in half! That's right, watch this video tutorial to learn how to cut a beer bottle in half with acetone, string and fire. You'll also need the glass bottle to be empty, and probably a pair of scissors.

What you do is tie a piece of string around the beer bottle where you want to slice it in half, then take it off and soak it in acetone or nail polish remover. Put it back around the bottle, light it on fire, then drop it in cold water. It's that simple. Now you can even use the beer bottle cup as a toothbrush holder, or a pen holder. This is a great trick to show off your ingenious mind! Just don't tell people you saw it on a video.

23 Comments

OMG
Czech Beer
good stuff....

cool video

had to check the science on this many times
so unbelievable

WHAT did the science tell you?

super cool...

This really does work. I tried it so that I can cut all my bottles in half to start an indoor garden. The trick is in the thickness and how much the string can absorb. BTW acetone is also known as finger nail polish remover. I havent tried this with rubbing alcohol yet. The thicker the glass, the more wraps around the bottle you need. I tried it with regular yarn and it worked fine. I tried it with construction string (yellow) and it didnt seem to absorb enough acetone to even light.

A few words of wisdom: wear gloves, make sure the water is cold, wipe excess acetone off of the bottle. I first wrapped some string around the bottle, tied off a knot, then soaked it in acetone. The put it back on the bottle and wipe the glass off so the flames dont go crazy. Rotate the bottle constantly while the string is on fire, then dunk it in cold water. You do not need to apply very much pressure. One thing im not sure about is if you rotate the bottle until the acetone burns out, will the surrounding parts of the bottle near the string be just as hot, thus producing an unclean cut? or does a clean cut depend on a cold bottle with a small amount of heat in a confined area? (the string) i have a lot of bottles to practice with because I actually have a use for this, and I will post results on instructables.com soon. Thanks for posting this. Cheers!

no one read the long comments like this ur wasting ur on time -.- zzzzzzzz

i read it, well the first bit anyways

might be the reason that you can't read proper and therefore takes you forever. This was the most informative comment of all, you claim of being too long. Get a life. You wasted yout time commenting nonsense as did I telling you that you are a moron.

A two paragraph comment and you cannot read it cause is too long?. My god!. Worst. Do you actually think that people is as lazy as you are. Good luck with your life buddy, you will need a lot of it if you cannot read a simple comment with a few sentences within.

I wonder if you can do this from top to bottom to cut the bottle down the middle....

This works! I used regular old yarn and it the top just cracked off.

i tried this three times and not even a crack! when is the glass too thick for this to work? maybe that's the problem.

i have a new exuse to drink another beer :P

sweet trick man. think iv got an idea for an ashtray

I have no words. Pretty amazing.

yo.

Cool Stuff. Although I haven't tested it, the video is Scientifically factual.

After breaking 1 bottle and getting high off the acetone fumes I tried again. I still can't get it, maybe I'm not waiting long enough? I tried dunking it into the cold water and applying pressure, no change, I tried hitting it on an angle, still no change. I have to learn how to do this so that I can turn an empty case of beer into a bunch of cool drinking glasses.

Nice!
Very simple to execute.

Thanks to "Yadda" for the comment about the thickness of the string and how much it will absorb. This indeed turned out to be my issue as I could not even get my string to light. I am still practicing this. I chose a blue glass bottle, and after it broke, the glass also fractured slightly below the break. Also, I am having trouble getting a clean, straight break. Could this be too much acetone residue cause the flames to lap too far (as Yadda mentioned) or could it be because there is some sort of special process blue glass bottles are made with? I am using Skyy Vodka bottles.

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