Hi Marla!
  Welcome to the Disney Parks Moms Panel. 
 I would not be without my refillable drink mug during my stays at Walt Disney World.  In the unlikely event that I am not using a 
Disney Dining Plan, I would make a separate (length of stay) purchase of the mug by itself.  I love my coffee, and having unlimited refills across the whole Resort at the beverage stations at any 
Disney Resort hotel, is something I am not going to miss!  Along with coffee, there are other hot drinks available such as tea or hot chocolate, and a selection of fountain drinks. All the Disney Resort hotels have a Quick-Service location at which you can make your refills, and for the Deluxe Resort hotels you can find the beverage stations at the following :
 Disney's Animal Kingdom Lodge: The Mara 
Disney's BoardWalk Inn: BoardWalk Bakery
 Disney's Beach Club Resort: Beach Club Marketplace
 Disney's Contemporary Resort: Contempo Cafe
 Disney's Grand Floridian Resort & Spa: Gasparilla Island Grill
 Disney's Polynesian Village Resort: Capt. Cook's
 Disney's Wilderness Lodge: Roaring Fork
 Disney's Yacht Club Resort: The Market at Ale & Compass. 
 Please come back and visit us if you have any further questions.  We will be happy to help you plan your magical vacation to Walt Disney World. 
 ~ Sue