Amazon.com: White Window Chalk Markers Pen: 6 Pack White Glass Marker, Liquid Chalk Marker for Chalkboard Signs, Car Window Paint Marker Pen for Bistro, Jars, Erasable, Non-Toxic, 5 Nib Sizes (1, 3,
Amazon.com : ZODDLE Liquid Chalk Markers, (1mm Extra Fine Tip, 10 Vibrant Colors) Erasable Marker Pen - For Blackboards, Chalkboard, Glass, Window, Label : Office Products
Chalk Pens for Blackboard, Washable, 8 Chalk Pens Colour x 15 mm - Chalk Markers for Adults & Chalk Pens for Windows, Blackboard, as Glass Pen & Whiteboard : Amazon.com.au: Toys & Games
Gainwell White Liquid Chalk Marker, 3 mm and 6 mm Tips – for Use on Chalkboard, Whiteboard, Glass – Pack of 4 – Water-based Pen for Wiping with Wet Cloth : Amazon.de: Stationery & Office Supplies