stuffer
Stuffer is a general term for a person or device that fills or packs material into a hollow space or container. It is derived from the verb to stuff and the agent noun suffix -er. The word can describe both a role and a tool, depending on the context.
In textiles, upholstery, and crafts, stuffing refers to the material used to give shape, cushioning, or insulation
In food preparation, a stuffer usually denotes equipment used to fill casings or cavities with a stuffing
In manufacturing and crafts, stuffing tools or stuffing guns are used to insert filler material into garments,
Overall, stuffer encompasses both a range of devices designed to fill or pack materials and the materials