Railcatering

When I went to Amsterdam today, I encountered something in the train I hadn't seen before. (Admittedly, I don't travel by train very often ... ). Instead of the expected catering trolley, a man with a catering backpack came by! He was actually carrying all catering items in a backpack and a snack tray in front of him. Very innovative, or at least that's what I thought.
Railcatering in action