Acrylic Paint Cafe'

I have found that for painting masks using acrylic paint works best. I struggled for years figuring out how to dispense the paint and I find this way to be the most organized: I open an Acrylic Paint Cafe' on which the paint is in little paint containers on a counter that I stand behind. The paints can either be mixed (by me) or the students can help themselves to ONE color at a time, and they don't get another color unless they return the color they have at their seat. The student take their owns brushes and water and it seems to work out pretty seamless.