They fill the mugs for you at the BC/YC so I don't think you can get your refillable mug filled if it isn't from that resort. How many mugs do you plan on purchasing? How long will you be at each resort? I think you need to do the math UGH!!! Our BC mugs were the mugs we used the lest so if I go back there again I don't think I would bother to purchase them but that is just me. We seem to eat more in Epcot when we stay there and although the pool is very nice I don't drink much while I am there because I am swimming and then we go back to our room to get ready to get going. Beaches and Cream is always packed and my children usually want to get a Milk Shake when we go there. That is just somethings that my family has noticed. We also get the coffee pot to use in our room when we are there so we don't need it for coffee or Tea either.
Unfortunetly, this is the case. I wish they would come out with a "Disney World Resort" mug for use at ALL the resorts. We are staying at 3 seperate resorts during our stay. Thats 3 Mugs X 3 resorts X10 each or $90 !! I am not sure what we are going to do.