At Walt Disney World and Disneyland in 2026, you are permitted to bring a cooler as long as it does not exceed 24" long x 15" wide x 18" high (61 cm x 38 cm x 46 cm). These dimensions apply to suitcases, bags, and backpacks as well. A critical rule to remember is that loose or dry ice is strictly prohibited inside the parks; you must use reusable ice packs or frozen water bottles to keep your items cold. If you bring loose ice, security may ask you to dump it before entering. Additionally, your cooler cannot contain any glass containers (except for small baby food jars) or alcoholic beverages. While wheeled coolers are allowed as long as they meet the size requirements, they can be cumbersome in crowds, so many "pro" visitors recommend a high-quality soft-sided cooler bag that fits easily under a stroller or on a locker shelf.