After AFC n NFC championship games, what happens to the losers hats n shirts that were made? Any out there?

When the AFC and NFC championship games and the Super Bowl are finished, the winning teams get hats and shirts immediately after the game that say "Champions" and their name and logo. Logically, they make "Champion" hats and shirts for both teams. I'd ume they destroy the losing teams items. But are there some that don't get destroyed and are there any out there to see or buy?