Never a fan of those carboard boxes containing the slides...

Microscopic Slide Case for new unused slides. Protecting them from dust etc. Simple design for fast multiple printouts.

Side of the bottom case is open for easy access to individual slides, by only touching their sides. Similar to the usual cover glass cases.

Top and Bottom parts do interlock quite well due to the layered printing structure wich provides additional grip. But can be also be hold together with a simple rubber band