What shall I do with these?

One of my husband’s coworkers gave them to me (and continues to give them to me, every week or so, about a dozen at a time). Her husband uses them at work (I think they hold vials or tiny test tubes or something medical-ish) and when he’s done with them they’re considered trash, because they can’t be reused – at least not for their original purpose.

Purple, plastic boxes. Sturdy little things. The insert comes out easily and the top latches closed, and these were designed to be disposable.

Well, not on my watch. So, brainstorm with me – what shall I do with these?