Yes, you are allowed to bring your own snacks into Universal Studios Hollywood, but the policy includes several specific restrictions for 2026. Acceptable items include small snacks, bottled water (up to 2 liters), and any food required for special dietary or medical needs, including baby formula. However, you cannot bring "open containers" or large, hard-sided coolers. Any soft-sided insulated bag must be no larger than 8.5 inches wide by 6 inches high by 6 inches deep. Prohibited items include glass containers, alcohol, and any large meals or "picnic" style setups that require significant space. All bags are subject to X-ray and physical inspection at the security checkpoint before you enter Universal CityWalk. It is also important to note that outside food and drinks are typically prohibited during "separately ticketed events" like Halloween Horror Nights. For a standard day visit, bringing your own protein bars, fruit, or small bags of crackers is a great way to save money, provided you can fit them in a standard-sized backpack that complies with the park's bag policy.