Can An Insulated Backpack Be Brought Into Universal Studios?

Can An Insulated Backpack Be Brought Into Universal Studios? All bags, backpacks, purses, packages and items are subject to X-ray and/or additional inspection prior to entering CityWalk or the Theme Park(s). Suitcases and bags with wheels are prohibited. Are backpack coolers allowed in Universal Studios Orlando? Suitcases, coolers or backpacks with or without wheels larger