It was the 70s. It was a space age plastic. They seemed to do that to a lot of things. But also, if just left out, I bet it would be easier to swap out or lose.
“OH shit, I dropped it in the decorative rock out side the capital! Is it this one? This? Oh, god, I am so screwed.”
– Picks up a chunk of lava rock. –
“Oh thank god, saved! I got it right here!”