Hi Belinda!
Thank you for bringing your question to the Disney Parks Moms Panel!
You may have read about the resort refillable mugs that are offered with the
Disney Dining Plans and also available for purchase at
Walt Disney World Resort locations. These Refillable Souvenir Mugs currently cost $18.99 and can be refilled for 14 days after purchase, but they are only refillable at resorts...not the theme parks.
In my opinion, they are a great feature with the dining plans, but not necessarily something we purchase if we aren't on a dining plan for that trip. However, I think they are ideal if you plan to spend a lot of time around your resort.
Another possibility is that you read about the Water Park all-day refillable mugs. I have purchased one of these before at
Disney's Blizzard Beach. We got ours at the
Cooling Hut and it looks like the price for one now is $11.99.
Please note that you can get a complimentary cup of water at any of the Quick Service locations on property. It's also not a bad idea to carry in a bottle of water, especially in the summer heat. There are water fountains throughout the parks, but most people aren't used to the different taste of the Florida water.
I hope this helps! Please let me know if you have any other questions.