Some Shake Shacks are open. Some are closed. For those that don't live close enough to one of the former, Goldbelly is offering the chance to have their juicy, delectable burgers delivered right to your door. Their ShackBurger 8-Pack comes as a make-it-yourself kit, including eight 100% Angus Pat LaFrieda-blend beef patties, eight non-GMO Martin's Potato Rolls, eight slices of American cheese, and four ounces of the top-secret ShackSauce. You supply the lettuce, tomato, butter, salt, pepper, and appetite.