You are absolutely allowed to bring a S'well bottle—or any other reusable stainless steel or plastic water bottle—into Disney World theme parks. The only strict restriction regarding containers is that they cannot be made of glass, as glass is prohibited for safety reasons (with the exception of small baby food jars). Bringing a high-quality insulated bottle like a S'well is a popular "pro-tip" for 2026 travelers because the Florida heat can reach 95°F or higher, and these bottles can keep your water cold for up to 24 hours. You can refill your bottle for free at various "Water Bottle Refill Stations" located throughout the parks, often found near restrooms or in newer lands like Star Wars: Galaxy's Edge. Furthermore, you can request a free cup of ice water at any quick-service dining location and pour it directly into your S'well bottle, allowing you to stay hydrated without spending $5 per bottle of Dasani.