Pressurized container including flowable product and non-soluble propellant

A pressurized container assembly comprising:

• a pressurized container;
• a flowable product and a propellant disposed within the pressurized container under pressure, wherein the propellant is substantially non-soluble in the flowable product within the pressurized container;
• a valve coupled to the pressurized container, wherein the valve is configured to be selectively actuated to enable the flowable product to be dispensed from the pressurized container;
• and
• a shearing chamber in fluid communication with the valve, wherein the shearing chamber is configured to receive a flow of the flowable product and the propellant when the valve is actuated, the shearing chamber configured to impart shear to the flowable product as the flowable product flows through the shearing chamber to foam the flowable product within the shearing chamber,
• wherein the shearing chamber includes parallel surfaces defining a boundary layer configured to impart shear to the flowable product as the flowable product flows through the shearing chamber,
• wherein the shearing chamber includes an outer shell and an inner shell, wherein the inner shell is nested inside of the outer shell to define the parallel surfaces defining the boundary layer.