Ink on a ink film 1 wound around a first supply reel 5, which is driven by a first DC motor 21, is transferred to an intermediate recording medium 7 wound around a second supply reel 8, which is driven by a first stepping motor 31, in a first heating section 500. The container assembly includes a flexible pouch and a base. The method may further include receiving a designated key and generating a second package based on the key.