A cage for holding a filling material includes a housing have a first part and a second part. An orifice is defined between the first part and the second part for holding a filling material. The housing is shaped in a manner such that is it insertable inside a cavity and has an open position in which filling material may be inserted into the orifice. The housing also has a closed position in which the filling material is trapped within the orifice. The housing is cage-like for holding the filling material. The housing may include a handle, hinges for joining the first and second parts, and a latching mechanism for latching the first and second parts together.
