On Sep 14, 12:31*am, RubEric wrote:

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How should I go about cutting a 2 inch diameter disk out of a bottle?

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A diamond hole saw may be a possibility, but they are EXPENSIVE.

A 2" diamond core drill is about $50. It will do exactly what you
want. If that is too much for your budget, find a more inexpensive
hobby. Oragami comes to mind....

Joe