Pre-portioned popcorn packages come complete with popcorn kernels, seasonings, salt and bags of butter flavor and cooking oil. It makes sense to purchase these economical packages for an all-in-one kit, bringing you everything you need to make loads of concession stand popcorn. These packs work for all types of popcorn poppers, but read the instruction manual on your popper just in case it requires any special preparation, or cannot handle a certain ingredient.