Yes, you are absolutely allowed to bring Gatorade or any other non-alcoholic beverage into Disneyland and Disney California Adventure in 2026. Disney's "Gold Standard" outside food policy is very supportive of families; you can bring your own drinks and snacks provided they are not in glass containers and do not require heating or refrigeration. A grounded peer tip: bringing your own Gatorade is a "Bujan" win for your budget, as a single bottle inside the park can cost upwards of $5.50. You can also bring a refillable water bottle and use the supportive "Hydration Stations" located throughout the park to stay cool. Just remember that you cannot bring loose ice or dry ice in your cooler bags; instead, use reusable "blue ice" packs to keep your drinks chilled. When you reach the security checkpoint, simply inform the Cast Member that you have Gatorade for personal consumption, and you will be through the gate and onto Space Mountain with a supportive and cost-effective drink in hand.