Yes, you can absolutely bring water containers into Walt Disney World, and in 2026, it is highly encouraged as part of Disney's sustainability efforts. Guests are allowed to bring reusable water bottles (plastic, metal, or insulated) as long as they are not made of glass, which is strictly prohibited for safety reasons. You can also bring in plastic bottled water or large jugs. A popular strategy for the Florida heat is to fill a bottle with ice at your resort before heading to the park. To make refilling easy, Disney has installed numerous bottle-filling stations near restrooms and in the queues of newer attractions like TRON Lightcycle / Run and Guardians of the Galaxy: Cosmic Rewind. Additionally, you can walk up to any Quick Service dining location and ask for a "free cup of ice water," which you can then pour into your own container. This is a great way to stay hydrated and save the $4–$5 per bottle that Disney charges at vending carts. Just remember that hard-sided coolers and loose ice are not permitted; if you want to keep your water cold, use reusable ice packs inside a soft-sided cooler bag instead.