Yes, in many stores Burger King offers free refills in its restaurants. If the Burger King store has a Coca-Cola Freestyle machine, where you (the customers) fill up the drink yourself, it will have free refills. There are more than 200 Burger King restaurants with these machines in the UK. This means that in over 200 Burger King restaurants in the UK, you simply need to order a small drink or a meal that comes with a drink, and refill your drink once it has finished.