How easy is it to lose a microSD card?

This simple and practical rotating lid microSD card storage box can hold up to 24 cards.

This design is inspired by Bgill's microSD card storage case. It features a ring-shaped arrangement of card slots and is equipped with a non-slip textured grip surface on the outside.

When opening it, you need to be extra careful, as the microSD card might accidentally slip out. It is recommended to print the upper and lower parts in different colors, so you can tell at a glance which side is the top and which side is the bottom.

Size: diameter 50 mm × height 21 mm

Edit: May 29, 2017
An additional second cover plate with a different grip design has been added, making it easier to further distinguish between the upper and lower covers.