Yes, Disney allows guests to bring plastic water bottles into their theme parks, and it is a highly recommended way to save money and stay hydrated in the Florida or California sun. The primary restriction is that glass containers are strictly prohibited for safety reasons (with the exception of small baby food jars). You are welcome to bring disposable plastic bottles or reusable ones made of plastic, metal, or silicone. Disney provides numerous water bottle refill stations throughout the parks, and any "Quick Service" food location will provide you with a cup of ice water for free upon request, which you can pour into your bottle. In 2026, Disney continues to emphasize sustainability, so while single-use plastic is allowed, they encourage the use of refillable containers to reduce waste. Just ensure that your bottles—and any coolers you bring them in—fit within the park's size guidelines (coolers must be no larger than 24" long x 15" wide x 18" high).