The shelf life on the mineral oil used in liquid smoke is indefinite.
The Sink Hole Cover will not achieve a water tight seal on its own, and an approved silicone product will have to be applied in between the sink surface and the Sink Hole Cover. 
The WMOB and IMOB are made of a High Impact Polystyrene.
The air admittance valve is designed to take the place of a fixture or branch vent.    
Ice maker outlet boxes are designed as a termination point for the water line connection when installing an ice maker. 
This box is designed as a termination point for all drain and water connections necessary when installing a washing machine.