I made this in SolidWorks and exported to STL to store my USB sticks and lids. It holds 7 sticks/lids. 100mm x 40mm x 30mm.

Came out pretty good.

Printed on my WanHao D5S Mini

Printed at 0.1 layer height

20% infill

PLA at 195c

Approx print time for me 3 hrs