Clipper cards come in four varieties: adult, youth, senior and disabled (which includes Medicare cardholders). Adult Clipper cards may be obtained from a wide variety of vendors, but youth, senior and disabled Clipper cards must be obtained from SamTrans or another Bay Area transit agency. Each Clipper card contains some sort of stored value (e.g., monthly passes, "Clipper Cash" e-funds used for transit fares) and the history of recent trips using the card. Clipper cards generally confer an approximately 10% discount relative to cash fares.