Yes, you can bring an ice chest to Disneyland, but it must adhere to strict size and material guidelines. According to the 2026 park rules, coolers or ice chests must be no larger than 24" long x 15" wide x 18" high (the size that fits in a standard locker). Crucially, loose ice and dry ice are prohibited; you must use reusable ice packs or frozen water bottles to keep your items cool. This rule was implemented to speed up the security screening process, as "loose" ice makes it difficult for guards to see the contents of the cooler. Additionally, glass containers and alcohol are strictly forbidden (except for small baby food jars). Soft-sided coolers are generally preferred as they are easier to carry and fit more easily into strollers or under the seats of attractions. If your cooler is too large, security will require you to leave it in your vehicle or rent a jumbo locker outside the park entrance. Most families find that a small, insulated "lunch bag" style cooler is the most practical choice for bringing in snacks and sandwiches while avoiding the high cost of park food.