A quick cheap and easy way to engrave glass using the xtool S1 40-watt diode laser or any laser that has the same capabilities. In this video we use some super cheap acrylic paint and the rotary tool from xtool. with the two items combined it is easy and simple to engrave glass and cost very little. No need to buy expensive product for glass engraving when you can do it for around a dollar. Using the rotary tool you can engrave cups, tumblers, and glass. the RA2 by xtool serves multiple purposes.