A tray I made to hold my 11/0 Miyuki Delica seed beads. Can also hold Toho vials of course. Sides are high enough to stop the vials from falling over while moving the tray but low enough to see colors from the side.

My profile has ironing on the very top layer to make sure it looks nicer on the top, if you do this, make sure you use ironing settings that you've already calibrated as this can vary between filaments, printers, etc. You can turn off the ironing but it may leave a bit of an ‘unfinished’ top which happened on the first prototype I printed.