Traitor

If he actually works for Pepsi, and that's not just an old shirt or giveaway, that (buying/consuming a competitor's product in public) could get him fired. Had a teammate in soccer whose dad worked for Pepsi, (both her parents were at every game, he took her to practice) even if they were part of the snacks some parents brought she could not drink Coke because he could lose his job for his that. Yes he got lots of free Pepsi products but it sucked for her. Same for people who are Coca-cola employees, assume it's the same for outside of beverages for the non-fast-food jobs (so like Hershey vs Mars, Frito Lay vs some other chip brand but they're owned by Pepsi so maybe they have the soda restriction too).