A server for campaign optimization is described. The communications engine is configured to enable the community of participants in the market to send market inquiries from the demand side of the market, and the business logic engine is configured to process market inquiries and responses to include them in the database of supply and demand information. The multi-functional cap nests over and seals the mouth end of the container, allows for the nesting of a sub-container inside the cap, and allows the products to be resealed without contaminating each other. TRA requires a small receiver to be placed at a point of desired focus. A pair of rack gear units may be provided at outer upper sides or outer lower sides of the pair of or more slide channel units, and a pair pinion units may be installed on the accommodating basket and engage the rack gear units, respectively.