A Luggage-Space Saver for an SUV, Pick up Truck, or any smaller vehicle, attached to the rear of the vehicle by sliding the shaft, at the bottom of the \u201cCargo Backpack\u201d, into the Receiver hitch of the vehicle. The copolymer contains at least 15 mol % of an isobutylene type donor monomer and at least 15 mol % of an acrylic monomer as an acceptor monomer. The data base may be unlinked, such as documents distributed over directories on a PC, or linked, such as the world-wide web. Each coupon entitles its purchaser to a substantial discount on a product, which discount exceeds the purchase price of the coupon. In particular, all the starting ingredients should preferably give a negative result of the Ames test and have a PII, or skin irritation, value of 2 or less. A pattern of light extracting deformities on at least one surface of the panel member may vary to cause light to be emitted from the panel member in a desired light output distribution.