And here's how I did it.
Originally, I wanted a bottle with a thin spout so that I could draw circles and squiggles on my canvas. But then I went further and drew an image with it. Since you have to squeeze and draw at the same time, it was a little tricky, but I liked the effect. I didn't want a hard line, anyway. Also, if you apply it thickly, it adds dimension and takes a couple of hours to dry -- that, I did not want.
It says "paint for craft foam" but I used it on Stonehenge paper and it worked very well.
Simplicity is the removal of the useless and the unnecessary--source unknown