Hi Kevin,
Thanks for visiting the Disney Parks Moms Panel with your question.
Disney's Animal Kingdom Villas - Kidani Village is a fabulous choice as a resort for your traveling party. The spacious villas are perfect for larger parties, and the theme and decor is amazing.
The Rapid Fill mugs are a great way for you and your family to enjoy beverages such as sodas, coffee, and tea while you are at your resort. There is a graduated price structure for the number of days that you want your Rapid Fill mugs to be active. Currently, the price for a Rapid Fill mug for one day is $8.99, two days is $11.99, three days is $14.99, and length of stay is $17.99. If you have purchased a Disney Dining Plan, each member of your traveling party will receive a Rapid Fill mug active for the length of your stay as part of the plan. I believe that the locations for the Rapid Fill mugs at Disney's Animal Kingdom Villas - Kidani Village are Johari Treasures, which is the merchandise location in the lobby, and the Maji Pool Bar located at Samawati Springs pool.
The Rapid Fill mugs that you purchase at your resort will not work at the Disney theme parks, as the theme parks are not a part of the Rapid Fill program. You can purchase a Rapid Fill mug at Disney's Blizzard Beach Water Park or Disney's Typhoon Lagoon Water Park; however, the Rapid Fill program at the water park is separate from the one at your resort.
I hope that this information is helpful for you, Kevin. Have a great time planning your vacation, and please do not hesitate to ask if you have any further questions.