Welcome to planDisney, Adan! I'm so glad that I get to answer this question for you today because staying hydrated at Walt Disney World Resort is super important. I walk almost 10 miles a day when I'm at The Most Magical Place On Earth and I definitely couldn't do that without taking in lots of water so let's chat about what you can bring inside the Theme Parks and how you can fill up throughout the day.
Adan, you are more than welcome to bring your pre-filled water bottle into the Theme Parks with you
as long as it isn't made of glass. Refillable containers are allowed, even if they are larger than a standard water bottle, but they just can't be breakable so if your water bottle is made from plastic or metal, it should be just fine to bring inside. While you can't have your bottle refilled for you at dining locations, there are water bottle filling stations all around the Theme Parks that have a spot for you to stand your bottle upright while it's filled from the top so you don't have to do that hover move over the water fountain that we've all tried before! There is also water for sale at most food and merchandise locations and you can also ask a Cast Member for a complimentary cup of ice water at
dining locations as well. You don't need to be making any other purchases in order to grab some ice water, so please feel free to ask if you're feeling thirsty when you're walking past a Quick-Service restaurant!
Have a magical day, Adan!
Jessica