Cap for vessel for performing multi-stage process

Abstract From the Canadian patent

Embodiments of the invention provide a cap for a vessel for performing a multistage process for analyzing a sample, such as nested PCT or RT-PCR. In one embodiment, the cap comprises a body configured to be mated to the vessel to enclose a vessel interior, a cap cavity for holding reagents and a cap cavity , control portion that is adjustable with respect to the body between a firststage position in which the cap cavity is enclosed and fluidicly isolated from the vessel interior and a second-stage position in which the cap cavity is fluidicly coupled with the vessel interior.