Amazon.com : Vaci Neon Liquid Chalk Markers - Pack of 10 Erasable Chalk Pens with Reversible Fine Tip for Chalkboard, Window, Glass, Mirror, Blackboard and More; Non-Toxic Marker Pens with Chalkboard Labels! :
Chalk Markers - Etsy
Liquid Chalk Markers & Metallic Colors by Chalkola - Pack of 16 Chalk Pens - for Chalkboard, Blackboards, Window, Glass, Bistro | 6mm Reversible Bullet & Chisel Tip Erasable Ink : Amazon.ca: Office Products
Amazon.com : Liquid Chalk Markers - Set of 8 6 mm Fine Tip Chalk Pen + free 24x Chalkboard Stickers - Whiteboard Markers, chalkboard markers, Dry Erase Markers, Glass Markers, Window Markers
Bandle B. Chalk Markers Vibrant Liquid Chalk Pens for Chalkboard, Whiteboard, Car Window 8 Pack - Walmart.com