There was no way that Peter was going to let Cas just walk out of the pizza place with an empty tummy. It was not the way of the hero.
So Peter held up a finger to Castiel, shaking his head, "Hang on a second there, fella. Don't you move a scrap of muscle."
And then to the toug lady behind the counter, Peter offered his most charmingly wonderful grin, "We will take a whole one. A large. To that table there..." Peter said politely, pointing with his finger at a table by the window that was now vacant and clean.
"Sure, darlin'" the woman cooed, ringing them up. "13.95."
Peter nodded, checking his pockets out of habit.
A set of keys landed on the floor next to a sneaker, and his fingers worked a ten dollar bill, three ones and exactly ninety five cents out of the same pocket. To his surprise.
"Well then..." Peter set the bills and coins on the counter, and looked at Castiel with a smirk, "Thirsty, pal?"