An elongate, preferably rigid housing having a frusto-conical shape and a method for using the same. The large diameter end of the housing is generally adapted to be contacted with the lid of a container to ensure optimal sealing, while that portion of the frusto-conical housing having a small diameter is adapted to, either directly or indirectly, receive forces. The large diameter end is preferably at least partially hollow, and further comprises an inner member adapted to be contacted with smaller lids. Optionally, the small diameter end may be further characterized by a projection extending about the longitudinal axis of the device. For example, the projection may be cylindrical or frusto-conical. The small diameter end may further be characterized by having a recessed portion adapted to receive a tool, such as a conventional paint can opener.