Yes, you are absolutely allowed—and encouraged—to bring your own water bottle to Disneyland and Disney California Adventure in 2026. The only restriction is that the bottle cannot be made of glass and must not contain alcohol. Reusable stainless steel bottles like Hydroflasks or Yetis are popular choices for keeping water cold in the Anaheim heat. Disneyland has significantly expanded its infrastructure for 2026, adding dozens of high-speed bottle-filling stations throughout the parks, particularly in newer areas like Star Wars: Galaxy’s Edge and Avengers Campus. Bringing your own bottle is a smart financial move, as a single bottle of Dasani inside the park now costs over $5.00. Additionally, any Quick-Service restaurant will provide you with a complimentary cup of ice water upon request, which you can use to refill your bottle. This policy is part of Disney's broader 2026 sustainability initiative to reduce single-use plastic waste while ensuring guests stay hydrated during their 20,000+ step days.