Hi Joseph!
Thank you for bringing your question to the Disney Parks Moms Panel!
My husband and I recently stayed, for the first time, at the
Walt Disney World Dolphin Resort. We loved it! It's a beautiful resort with lots of great restaurant options and is within walking distance to two theme parks, as well as the Disney Boardwalk area. We will definitely stay there again!
The Swan and Dolphin actually offer their own version of a refillable mug. If you
click on this Swan and Dolphin Resort Report, you will find information about it on the bottom of page 5, in the lower right-hand corner. It looks like you will purchase the mug at the Dolphin Resort's Picabu, with refills available at several other locations.
If you have trouble finding it, I would ask a resort employee to point you in the right direction.
I hope this helps! Please let me know if you have any other questions, and have a magical vacation!