It's officially called the "Philadelphia Eagles NFL Pro Line by Fanatics Branded Black Super Bowl LII Bound Underdog T-Shirt" and sells for $27.99 in the NFL's official shop - one of many options for fans looking to celebrate their team's trip to the Super Bowl.
The Eagles now are massive underdogs entering Super Bowl LII, but many didn't expect them to get out of the NFC bracket and yet here they are.
A quick refresher on how this free beer promise came to be.
"I have a lot to prove to this city", Johnson said.
In the past, that offhanded comment might have slipped through the cracks, but in the age of social media, Bud Light-the official beer of the NFL-took it to heart and tweeted Johnson a challenge.
But no one on this Eagles team, the one that went a franchise-best 13-3 in 2017 before knocking off the defending NFC champions and embarrassing the league's top defense on Sunday, seems to mind all that much.
"I'm surprised to see you guys here, I thought it was all over", the fictional king says while admitting a rare mistake in judgment by counting out the birds. Other than rooting for Tom Brady to save you from having to give 1.5 million rowdy Philadelphians a free beer? "Deal?" said Bud Light in a tweet in August.