Hey there, Brenda!
Thanks for stopping by the Disney Parks Moms Panel with your great question. You are going to be having a Zip-a-Dee-Doo-Dah day at the Disneyland Resort in no time!
Staying hydrated at the Happiest Place on Earth is essential, so I'm glad you are already thinking about drinking enough water during your days in the parks. I'm happy to inform you that you are more than welcome to bring your own water bottle to refill. This was a life-changer for me when I finally started bringing my own refillable water bottle on vacation. With so much going on during the days, it was easy for me to forget about drinking water which would lead to headaches and general crabbiness. Once I focused on staying hydrated, my park days were so much more pleasant! Water fountains are available around the parks usually near restrooms, but you can also request complimentary cups of ice water at all Quick Service restaurants at the Disneyland Resort.
You are also welcome to bring outside food or beverages into the parks with some limitations, so make sure you go over the
Park Rules before you arrive. I like to keep some snacks on-hand or in a
locker rental for my preschooler throughout the day.
I hope this helps, and please return if you have any other questions. Have a Fantasmic day!
-Jennifer