So mints are here.
Apparently you can only hold 2 neutralising mints at a time. It's not currently possible to receive more than 2 mints anyway, but apparently if you want more in the future you'll be forced to use any mints you're still holding.
Seems like these are gonna be very limited, like the legendary Pokémon incenses that you aren't allowed to stockpile.

The wording of "effects of the mint can't be undone" discouraged me a bit, as it somewhat implies "you can't overwrite the mint with another mint", but I dunno.
I hesitated, but then remembered I need to actually run calcs on my OGPP team to see if this is worth it.