I recently noticed one of the caps for my pedals was missing. Knowing that something used to be there, I figured I should cover it once more. The solution? The cap off of a glue stick.
I’ve done some moderate to heavy riding this past week and it has yet to fall out - even withstanding some good spills. It could always be shaved down or painted black, but I find it’s the right size to grab and orange matches the scheme of my uni.
Sharing in case it’s of use to anyone else.