Anyone ever heard of infusing an object with a tulpa's conciseness? It's probably comparable to items that are possessed by spirits. The idea is to fashion an object that can hold a conciseness to give it more direct influence with the world. Think of when someone makes a possession contract with a demon, but in this instance it can inhabit the object, not just a person temporarily.
It can be very difficult for someone to maintain a tupla in their mind or servitor in their mind, but the idea behind this is to give an entity a physical presence.