How To Perfectly Cut A Glass Bottle Using Motor Oil & Water

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If you have access to a lot of glass bottles but no drinking glasses, here’s how to cut a bottle into a drinking glass.

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Roman Ursu is showing a simple yet effective way of perfectly cutting glass bottles using water, and either vegetable oil or engine oil.It basically works like this, the blade is super thin and gets super hot.

Steel is a conductor and conducts all the heat, it transfers it immediately to the oil which becomes super heated, and this cuts the glass.

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Basically the way this works is by heating the oil up you create a large temperature difference between the oil and the water, this temperature difference causes the glass to expand then break.

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