Patent ID: 7550112

Claim:
A device for determining the presence or amount of an analyte in a sample, comprising: a first cup comprising an interior for holding a liquid sample, a top, one or more sidewalls, and a bottom; a second cup having a top, one or more sidewalls, and a bottom; the first cup rotatably disposed within the second cup and having first and second positions within the second cup; at least one reservoir for containing an aliquot of sample located between the first and second cups, the first cup further comprising an aperture venting from the interior of the first cup into the at least one reservoir when the first cup is in the first position, and the aperture being closed when the first cup is in the second position; a valve assembly interfacing with the at least one reservoir for regulating communication of the aliquot of sample from the interior of the first cup to the reservoir; one or more test elements comprising a sample application zone, for determining the presence or amount of an analyte in the liquid sample; a passageway connecting the at least one reservoir and the sample application zone, the passageway being closed when the first cup is in the first position and open when the first cup is in the second position; and a lid that comprises at least one key element, and wherein the first cup comprises at least one key hole.