To keep or not to keep

So yesterday I was searching the medicine closet for our thermometer (baby boy is a little under the weather) and while searching, I run into these guys:

I almost forgot about them. 

So I almost threw 'em out because it's kind of gross that they are like tiny time capsules filled with my pregnant pee, but at the same time I think I haven't parted with them because they remind me what an exciting moment it was so see a plus sign (and then a couple weeks later another--just to "make sure")

Is that weird?  Am I the only one that has kept them?

Thoughts?