The Universal Coca-Cola Freestyle refillable cup system (often called the "Freestyle Souvenir Cup") works using RFID technology embedded in the bottom of the cup. After purchasing the cup for a flat daily fee (typically around $18–$20, with discounts for multiple cups), you can visit any of the dozens of Freestyle machines located throughout Universal Studios, Islands of Adventure, and Volcano Bay. You simply place your cup on the dispenser's tray, and the machine "reads" the chip to verify you have a valid daily activation. You can then choose from over 100 different drink combinations. There is a 10-minute "cooldown" period between refills to prevent sharing a single cup among a large group. If you return to the parks on a subsequent day, you do not need to buy a new cup; you can simply pay a lower "reactivation fee" (around $11–$12) at any dining location to get another full day of unlimited refills. Note that this cup is separate from the "Butterbeer" souvenir steins and the "CityWalk" refillable programs.