Storage of solids. In the absence of jars with ground corks, solids are well preserved in twist-off jars. If the Teflon or polyethylene coating of the inner surface of the nut is damaged, it is enough to put an additional disc of polyethylene foil. Solids can also be stored in polyethylene film bags, closed by twisting the upper part and tightening with a rubber band. The label should be put inside the bag.