Yes, you are absolutely allowed to bring a Hydro Flask (or any other non-glass, reusable water bottle) into EPCOT and all other Disney World parks. Disney’s official policy encourages guests to bring outside non-alcoholic beverages for self-consumption, provided they are not in glass containers. Reusable metal bottles like Hydro Flasks are a favorite among "pro" Disney travelers because they keep water ice-cold during the intense Florida heat. You can refill your bottle for free at various "Water Bottle Refill Stations" located near many restrooms, or simply ask for a "cup of ice water" at any quick-service dining location, which is also free of charge. When passing through security, you do not need to empty the bottle; however, be aware that if you have a large amount of ice inside, the security scanners may require a quick manual inspection. Using a Hydro Flask is not only a great way to stay hydrated but also a significant cost-saver, as a single bottle of Dasani inside the park can cost upwards of $5.00 in 2026.