Apparently the first menstrual cup ever was patented way back in 1884. Check it out- it empties into a bladder on a sling outside your body. Not something that would work today, but since they didn't wear pants/trousers back then, probably more plausible?
Hm...now I'm pondering variations to make it work for various cervix heights.
I came across this on Reddit, thought it was interesting, and thought I'd share.