That's pretty cool looking but I wonder what the USA equivalent of that type of paint product would be. I guess it is just stained glass paint.... (...now I have to satisfy my curiousity).

I've found Dickblick.com is the go-to site for anything art-related.

Here is where you can find this paint as markers to use them more easily. http://www.dickblick.com/products/pe...paint-markers/
And here are the paint bottles themselves. http://www.dickblick.com/products/pebeo-vitrea-160/