A storage tray provides storage for multiple types of wires, catheters, and other instruments used during surgical procedures. The storage tray includes a base and a set of walls forming a basin that holds liquid. A wire containment section within the basin holds multiple coiled guidewires in a channel filled with the liquid. The wire containment section includes an inner wall and one or more wall segments forming an outer boundary of the channel. A wire holder outside the channel holds end portions of the guidewires. Pulling an end portion of one of the coiled guidewires horizontally causes the guidewire to slide along the inner wall for separation and removal from the storage tray.