A testing kit that provides sequential access to contents therein, the testing kit comprising: a container upper portion having a cavity (138A; 138B) interior to the container upper portion and formed to receive a combination of a first test device and a second test device and further formed to hold the combination of the first test device and the second test device in a testing position during a test; a container lower portion connected at an edge to the container upper portion by a hinged portion, the container lower portion defining an interior space and including a recess formed to receive an article; a spine extending from and connecting an edge of an exterior surface of the container lower portion to an edge of an exterior surface of the container upper portion, wherein the spine, exterior surface of the container lower portion and exterior surface of the container upper portion form an outer cover, the outer cover securing an interior surface of the container upper portion at a predetermined obtuse angle relative to an interior surface of the container lower portion when the testing kit is in an open position; a moveable tray disposed in an opening of the interior space in the container lower portion through which the moveable tray slides in and out of the container lower portion, and the moveable tray defines an interior volume formed to receive test devices; a first test device formed to receive a second test device, the first test device initially stored and positioned in the interior volume of the moveable tray for access prior to access of additional test devices; a second test device initially stored and positioned in the interior volume of the moveable tray and formed to be disposed in the first test device to form the combination of the first test device and the second test device; and an instruction insert located between the container upper portion and the container lower portion and arranged for accommodation in the recess formed in the container lower portion, wherein the instruction insert is configured to be sequentially moved between the container lower portion and the container upper portion, the instruction insert comprising indicia thereon and including a flap that removably covers access to the cavity. a container upper portion having a cavity (138A; 138B) interior to the container upper portion and formed to receive a combination of a first test device and a second test device and further formed to hold the combination of the first test device and the second test device in a testing position during a test; a container lower portion connected at an edge to the container upper portion by a hinged portion, the container lower portion defining an interior space and including a recess formed to receive an article; a spine extending from and connecting an edge of an exterior surface of the container lower portion to an edge of an exterior surface of the container upper portion, wherein the spine, exterior surface of the container lower portion and exterior surface of the container upper portion form an outer cover, the outer cover securing an interior surface of the container upper portion at a predetermined obtuse angle relative to an interior surface of the container lower portion when the testing kit is in an open position; a moveable tray disposed in an opening of the interior space in the container lower portion through which the moveable tray slides in and out of the container lower portion, and the moveable tray defines an interior volume formed to receive test devices; a first test device formed to receive a second test device, the first test device initially stored and positioned in the interior volume of the moveable tray for access prior to access of additional test devices; a second test device initially stored and positioned in the interior volume of the moveable tray and formed to be disposed in the first test device to form the combination of the first test device and the second test device; and an instruction insert located between the container upper portion and the container lower portion and arranged for accommodation in the recess formed in the container lower portion, wherein the instruction insert is configured to be sequentially moved between the container lower portion and the container upper portion, the instruction insert comprising indicia thereon and including a flap that removably covers access to the cavity.