Yes, you are absolutely allowed to bring Gatorade and other non-alcoholic beverages into Disneyland and Disney California Adventure in 2026. Disney's official policy permits outside food and drinks as long as they are not in glass containers and do not require heating or refrigeration. Bringing your own plastic bottles of Gatorade is a smart, high-value move to stay hydrated in the Anaheim sun while avoiding the $5+ "theme park markup" on drinks. However, keep in mind that you cannot bring loose ice into the park; if you want to keep your Gatorade cold, use reusable ice packs or bagged ice in a cooler no larger than 24" x 15" x 18". Upon entry, simply let the security Cast Member know you have drinks in your bag. It’s also a helpful peer-to-peer tip to remember that any quick-service restaurant in the park will give you a free cup of ice water, which you can use to refill your Gatorade bottle or mix with electrolyte powders throughout the day.