But this year, it's been
announced that teams get buttons ahead of time. As the kits are more-or-less interchangeable between teams, and buttons with team-specific numbers on them are not, that seems likely to me the reason for it to be separate and not a part of the main kits. I'm guessing that the guess that the "very small item" is the set of buttons is right.
Of course, it could also mean that the "extra" 5th drive team member button is actually the game piece.
