Coffee machine with overflow feature

An espresso machine device having a steam wand, the espresso machine device comprising:

• a boiler supplying steam to a steam wand;
• a solenoid valve located between the boiler and the steam wand;
• an air pump that is controlled to provide variable flow of pressurized air to the steam wand;
• and
• a venturi located between the boiler and the steam wand, wherein the air pump supplies pressurized air to the venturi via a first fluid pathway that extends from the air pump to the venturi, and the boiler supplies steam to the venturi via a second fluid pathway that extends from the boiler to the venturi, the first fluid pathway being distinct from the second fluid pathway, wherein the first and second fluid pathways converge at the venturi so that the steam is mixed with the pressurized air at the venturi to form a steam air mixture,
• wherein the steam wand has an output steam nozzle, and wherein the steam air mixture travels through the steam wand along a steam path and exits the nozzle directly into a container, and
• wherein, when the supply of steam is stopped, the solenoid valve is closed to allow the steam path to have an open flow path to the atmosphere.