A method is disclosed for using robots to move items from one container to another. The method includes positioning a source container under a suction robot having two degrees of freedom only, the suction robot having a flexible suction end having a variable suction component that can cause suction to occur within the suction end upon contact with an item in the source container. The contact can be non-orthogonal of an end of the flexible suction and a surface of the item. The robot retrieves the item from the source container with the flexible suction end by lowering the flexible suction end into the source container to retrieve the item and lifts the retrieved item from the source container. The robot then moves the retrieved item horizontally from the source container to a destination container.