Review on 🖍️ Variety Pack of 6 White Liquid Chalk Markers - Ideal for Blackboard, Chalkboard Signs, Windows, Glass, Bistro Menus - Includes 3x Fine Tip (3mm) & 3x Bold Size (6mm) Dry Erase Chalk Pens by Abunsefer Chongbang

I got this to experiment with upcoming proms and weddings. I have only used them on glass as the seller specifically states that they must be used on non-porous surfaces if you want to be able to erase what you have painted/written on. The marker creates a smooth chalk/ink look with no gaps or smudges. In mirrors this allows you to see the reflection of your art (because of the nature of mirrors :). Good for writing on car windows (NOTE: I haven't tried them on tinted windows or painted areas of a car and don't know how they affect that). A damp paper towel can easily remove stains from glass surfaces. I bought white markers but could imagine colored markers being used to mark party glasses.