We have never purchased the refillable mugs before but now that they are included in the DP, we will be getting them on our next trip. We are staying in the cabins at the Fort this year. Since that resort is pretty spread out and you have to use the internal bus system (we won't have a golf cart) can you use them at any resort, for instance if you go to a resort for dinner, can we take our mugs along and fill them up in their QS restaurant before we leave? It's not really worth it to me to spend that much time waiting for a bus and back just to get a drink within the fort since we will have drinks at our cabin. But if we can use them elsewhere and we are already there it would be nice to have one for the road. Thanks!