A dispenser for viscous foods like condiments, batter and syrups employs a flexible plastic bag made of a flexible plastic material, one side of which or one end of which is formed to have a self-sealing, orifice formed in the wall of the bag by two slices or cuts in the plastic material. Wall preparation requires only the use of a standard hole saw thereby greatly minimizing installation time. The planar portion 16 contains perforations 24 sized so that when the utensil is rested on food in said receptacle liquid fat generated during cooking is allowed to pass from the food through said perforations and when cool congealed fat is generally prevented from passage back through said perforations. The invention also concerns the use of these materials to separate gases. The top metal layer is patterned and etched. The control units are equipped with a GPS positioning device to allow for automatic transmission of electrode location and for electrode placement without a manual survey being required.