Yes, you are absolutely allowed to bring bottled water and outside non-alcoholic beverages into both Walt Disney World and Disneyland Resort. In fact, Disney encourages this as a way to stay hydrated in the extreme heat. The only major restrictions are that the containers must not be made of glass (for safety) and you cannot bring in loose ice (reusable ice packs are required for coolers). You can also bring in a personal-sized cooler, provided it is no larger than 24" long x 15" wide x 18" high. To save money, many "pro" travelers bring a reusable filtered water bottle and refill it at the numerous filling stations located throughout the parks. Additionally, every Quick-Service restaurant in Disney will provide you with a free cup of ice water upon request, meaning you never actually need to pay the $4–$5 per bottle price tag for a Dasani once you are inside the gates.
Yes, you can bring bottled water into Disney parks. Disney’s official policy allows guests to bring in outside food and non-alcoholic beverages, including bottled water, as long as they are not in glass containers (except for small containers like baby food jars). This can be a great way to stay hydrated throughout the day, especially during warmer weather. Just make sure to check the most current park guidelines on Disney’s official website or app before your visit, as policies can occasionally change.