Yes, in 2026, you are permitted to bring your own water bottles into Disneyland Park and Disney California Adventure. The only major restriction is that the bottles cannot be made of glass, as glass is strictly prohibited for safety reasons (except for small baby food jars). You can bring reusable plastic, stainless steel, or aluminum bottles, as well as single-use plastic bottles. Alcohol is strictly forbidden in any container. To help guests stay hydrated in 2026, Disney has installed numerous filtered water-refill stations throughout the parks, and any Quick-Service restaurant will provide a complimentary cup of ice water upon request, which you can then pour into your bottle. This policy is a great way for families to save money—as bottled water in the park often costs $5 or more—and it aligns with Disney's 2026 sustainability goals of reducing single-use plastic waste across the resort.