I received the 18 Liquid Chalk Marker Set from Stardom Crafts.
The set comes with every color you could possibly want to draw/doodle with.
They are recommended for use on: glass, plastic, Metal, Glossy Boards, LED boards and non-porous surfaces.
They're non-toxic, water based and easily clean up with water.
As you can see above, I tested them on a window on the front of my house.
To use each marker, you shake them first and press them down for about a minute to get the color to flow to the tip.
I love how vibrant and painterly the colors are.
I'll admit I got impatient waiting for the colors to start flowing the first time I use each marker.
However, these chalk markers are quality and the colors lasted through two large thunderstorms under my covered porch.
They wiped off fairly clean, there was very little residue left on my window.
I've gotten a lot of color out of these markers so far, they're durable. They seem like they will last a long time.
I plan on using these to continuously decorate my classroom door for special events and announcements.
They sure beat out those waxy-type window markers any day.
**Disclosure: I received this product complimentary from Stardom Crafts. I was not compensated for this post, all opinions are honest and my own.