Stackable storage tray

I've made this stackable storage trays with even measures, so I could stack them easily in a space of 12cm height on my desk. The width of the tray allows 2 instances to be printed at a time on the CoreOne bed (even with a brim, first add instance then add brim). Takes 3,5h to print 2 trays of 30mm height and 4,25h to print 2 trays of 60mm height (0.25mm, 3 perimeters, 15% infill).