A packaging, shipping and display system having a one piece molded tray and a corrugated cover for a stack of products such as lawn and garden spreaders. The fluid pump assembly includes a first pump housing, a second pump housing and a flexible diaphragm disposed between the first and second pump housings. The continuous elastic absorbent core can have a tension reducing geometry in the crotch section of the article. The subject methods find use in the treatment of a variety of different conditions, where such conditions include various disease conditions. Calibration data is held in the registers when the supply voltage is out-of-range to prevent self-start up.