The park allows visitors to carry water bottles (maximum 2 liters), small snacks, and special food items for dietary and medical requirements. Soft-sided insulated bags are also allowed as long as they are no larger than 8.5" wide x 6" high x 6" deep. Alcohol, marijuana, and glass containers are strictly prohibited. If you feel like grabbing a bite during your visit to Universal Studios, you can always check out the varied in-park dining options.