Free refill
Free refills occur when a drink's receptacle, usually that of a soft drink, tea or coffee, is allowed to be filled again by its purchaser, free of charge, after they have consumed the drink. Occasionally the glass or cup holding the drink is not reused, and the "refill" actually constitutes the acquisition of a second (or more than one) additional entirely new drink(s) for no added charge, usually of the same kind (e.g.