The cases that DCCs came in, generally did not have the characteristic folding mechanism used for analog compact cassettes. Instead, DCC cases tended to be simply plastic boxes that were open on one of the short sides. The front side had a rectangular opening that exposed almost the entire cassette, so that any label on the cassette would be visible even when the cassette was in its case. This allowed the user to slide the cassette into and out of the case with one hand (which was seen as a major advantage for mobile use), and it reduced production costs, especially for prerecorded cassettes, because the case did not need a separate label. Format partner Matsushita and other did, however, produce blank cassettes (under their Panasonic brand) with a clam-shell-style case. Because DCCs have no "bulges" near the tape access holes, there is more space in the case behind the cassette to insert, for example, a booklet for a prerecorded tape, or a folded up card on which users could write the contents of the tape. In spite of the differences, the outside measurements of the standard DCC cases were exactly identical to the cases of analog compact cassettes, so they could be used in existing storage systems. The Matsushita-designed clam-shell case was slightly thinner than an analog compact cassette case is.