It's rude to take a soda from someone else.
Jacob was at a diner with all of his friends, but he ran out of his drink.
Jacob wants something to drink.
Jacob calls the waitress over to order himself another drink.
Jacob takes a sip of soda that his best friend had ordered for himself.
The waitress brings a fresh, cold soda over to Jacob's table.
Jacob's friend gets made and makes him pay for his food.