US Patent 8480953 System and method for vessel alignment

A vessel including an identification region may be placed in a holder. Through interaction of a positioning feature on the vessel and an orientation feature on the holder, the vessel can be placed into an alignment orientation, e.g., such that the identification region may be reliably read by a reader. The identification region may provides information related to the sample, such as vessel identity, sample volume, processes to be performed on the sample, and so on.