Watched one Capt maneuvering his roller bag that had a medium sized yeti cooler on top of it, while carrying another larger size yeti cooler slung over his shoulder and carrying another bag in his other hand. He boarded as flight crew on his narrowbody domestic flight. Besides the lack of storage room in the cockpit, I can’t imagine he’s going anyplace so remote where there’s no food at all. I’d hate to be dragging some slowly rotting chuck wagon of regular food around, especially if it’s just to try to save a few $. Not worth the hassle. 