so I will share it here
I made this at my plastic shop a few years back
3/8 & 1/4" ABS, 1/4" white acrylic lid
the blue tape makes the lid fit just snug enough to not need magnets or other fasteners but still come off easily. I can turn this upside down and nothing spills out.
I'm thinking about modifying it to have some hinged feet and a lip so I can use it as a portable easel.