I voted other. We always stayed at Fort Wilderness where a mug just didn't seem useful. Then we joined DVC and most places we stayed just didn't have convenient places to fill and use mugs. So it wasnt' worth it to us. But I did buy a mug once. Last Feb I took a trip with my mother and sister and we stayd at the All Star Sports and had a rental car. We bought the mugs on our first day. Used them at lunchtime, left them in the car (which was parked very near the bus stop). Picked them up when we got back from the park and re-filled them with a drink for the evening. In the morning my sister (our lone smoker) would take all three mugs when she went for her morning cigarette and would get our first cup of coffee for the day. Then we'd go to the food court for breakfast and get a second cup of coffee. And then we'd leave them in the car, head for the park, get them when we got back and refill for evening. Definitely worth it that trip especially since theywere still resort specific so they also made a nice souvenir. But staying at the DVC resorts, I can't think that I would ever bother with a refillable mug.