Amazon.com: Glass Pen Window Marker: Liquid Chalk Markers for Glass, Car Marker or Mirror Pen with Washable Paint - Car Windows, Mirror, Storefront Windows, Parade & Party, Holiday (White, Fine Tip) :
Chalktastic Chalkboard Markers for Kids Set of 8 Washable, Erasable Chalk Ink Dry Erase Pens for School, Chalkboard Menu Board & Glass Car Window - Neon, Pastel, White Chalk Pens - Gifts for Artists