I'm in the process of making some hatchling hides. I've been saving up sour cream tubs, butter tubs, cottage cheese tubs, etc. to use as baby hides. I plan on cutting an entrance and painting them black for added security since they are white in color.

My question is this, is there a non-toxic reptile safe paint that I can use on these tubs to paint them black? I would like the paint to not be water proof so I can wash the tubs (by hand with soap and water and then disinfected with F10) and not have the paint flake off.