A system for supplying a plurality of vessels, comprising: a feeding unit configured to supply a plurality of vessels to at least one exit position, wherein each of the plurality of vessels is configured to hold a sample, and wherein the feeding unit comprises: (i) a feed bin comprising a bottom surface, a substantially open top, a front side, a back side, an A-side, and a B-side, and configured to feed each of the plurality of vessels from an entry position at the top of the feed bin to at least one edge position of the bottom surface; (ii) at least one transporter comprising a series of steps positioned on at least one of the A-side or the B-side of the feed bin and configured to receive each of the plurality of vessels from the at least one edge position and transport each of the vessels to at least one transfer point, the system being characterised in that each step comprises a ledge and riser configured to individually transfer each of the plurality of vessels from one step to the next step in the series; and (iii) at least one transfer belt positioned at the exit of the at least one transporter and at or near the top of the feed bin, and configured to receive each of the plurality of vessels from the at least one transfer point and transfer individual vessels from the at least one transfer point to a bin exit position within the system, wherein each ledge and each riser comprise a wavy surface configured to align each of the plurality of vessels in a substantially horizontal orientation with a longitudinal axis of each of the plurality of vessels along the ledge or riser. a feeding unit configured to supply a plurality of vessels to at least one exit position, wherein each of the plurality of vessels is configured to hold a sample, and wherein the feeding unit comprises: (i) a feed bin comprising a bottom surface, a substantially open top, a front side, a back side, an A-side, and a B-side, and configured to feed each of the plurality of vessels from an entry position at the top of the feed bin to at least one edge position of the bottom surface; (ii) at least one transporter comprising a series of steps positioned on at least one of the A-side or the B-side of the feed bin and configured to receive each of the plurality of vessels from the at least one edge position and transport each of the vessels to at least one transfer point, (i) a feed bin comprising a bottom surface, a substantially open top, a front side, a back side, an A-side, and a B-side, and configured to feed each of the plurality of vessels from an entry position at the top of the feed bin to at least one edge position of the bottom surface; (ii) at least one transporter comprising a series of steps positioned on at least one of the A-side or the B-side of the feed bin and configured to receive each of the plurality of vessels from the at least one edge position and transport each of the vessels to at least one transfer point, the system being characterised in that each step comprises a ledge and riser configured to individually transfer each of the plurality of vessels from one step to the next step in the series; and (iii) at least one transfer belt positioned at the exit of the at least one transporter and at or near the top of the feed bin, and configured to receive each of the plurality of vessels from the at least one transfer point and transfer individual vessels from the at least one transfer point to a bin exit position within the system, wherein each ledge and each riser comprise a wavy surface configured to align each of the plurality of vessels in a substantially horizontal orientation with a longitudinal axis of each of the plurality of vessels along the ledge or riser. (iii) at least one transfer belt positioned at the exit of the at least one transporter and at or near the top of the feed bin, and configured to receive each of the plurality of vessels from the at least one transfer point and transfer individual vessels from the at least one transfer point to a bin exit position within the system, wherein each ledge and each riser comprise a wavy surface configured to align each of the plurality of vessels in a substantially horizontal orientation with a longitudinal axis of each of the plurality of vessels along the ledge or riser.