I put these little coquina shells in a glass candy dish with a lid, because they remind me of those pastel color buttermints. None of them are over 1/2" in size and most are smaller than that.
People have asked what I do with shells I find. Some of the things I've done with them can be found here. I have plans for many of them, when I get around to it. :) But mostly, I just enjoy looking at them.