Liquid Chalk Markers - Color Wand 10 Paint Pens + Free 40 Chalkboard Labels Safe For Kids Art, Windows, Menu, Bistro, Whiteboards - 6mm Reversible Nib with Bullet and Chisel Tips. These liquid chalk markers can be used on extremely wide range of materials, any non-porous surface. Including windows, glass, mirror, plastic, acrylic, chalkboard labels, teacher classroom projects and even metal. Also great use on ceramic jars, Cafe menus, Gym boards, DIY projects, Draw on toys, Signs. Premium-quality, bright, bold, opaque ink, fast-drying, erasable with a wet cloth, low-odor, and nontoxic inks.