How do riders eat during the tour DE France?

Answer 1

Each team has a couple of riders known as "domestiques", help/assist riders.

During a lull in the race they'll drop back to the team car and pick up bottles, energy gels, bars, bananas etc and then catch up with the rest of the team and distribute the food drink.

Sometimes they'll stuff their pockets, sometimes they'll get a simple shoulder bag to carry it back with.

During a professional race, the riders don't stop for anything. They'll eat and drink on the move, and if needed, pee on the move.

Answer 2

He won't be able to finish the stage, and will be forced to leave the race.