Food Coloring!
My daughter and I use this stuff all the time for arts and crafts, namely we take the food coloring and color glue to use for macaroni art and the like.
The coloring itself, both the bottle and the caps have made for some excellent shots. I have returned to them several times and each time I like what I can come up with.
Now the only question is, do they make more colors than the standard 4!
