Polyhydroxyalkanoates from which pyrogen has been removed are provided. % polypropylene and at least one wax. The battery inserts in a cavity of a base of the flap so that when fitted it is integrated into the flap. A target logical unit corresponds to different areas of storage on the one or more storage systems. The gellant system of the invention is useful in gelling polar oils to produce transparent or translucent gels useful in topical compositions.