Yeah, but they don't match the aesthetics of a miniDisc. The small size, more "modern" design (fully transparent materials, more colorful, ...) just looks more futuristic.
Ironically it also helps that self-recorded MDs were the more common option, so the discs aren't covered in labels/printing. (I have one modern prerecorded MD release, and while the printing is neat in some ways, it doesn't have that futuristic side as much)
I remember using a caddy in one of the first CD-ROMs, in high school, no less, instructed in the care and, particularly, the -feeding- of the CD Drive by the kind librarian :)
https://en.wikipedia.org/wiki/Caddy_(hardware)#/media/File:C...