To use the Puffle Food Station, go to the Pizza Parlor with your puffle and step on the machine.
The menu will appear. All penguins can buy a Pepperoni pizza for 5 coins each while member penguins can buy a Deluxe pizza for 10 coins each.
Once you buy a pizza, your puffle will eat the pizza and refill the food meter. Pepperoni pizzas slightly refill the meter while Deluxe pizzas refill the meter fully.