Method of utilizing a handheld bottle washer

A method of utilizing a handheld bottle washer comprising:

• providing a handheld body with a lower end, with an upper end opposing the lower end, with a body length separating the lower and upper ends of the handheld body, a longitudinal direction spanning from the lower end of the handheld body to the upper end of the handheld body, with two flexible opposing sidewalls joined together at a lower joint and at an upper joint to form a monolithic structure and each having an outer surface and an inner surface, defining an enclosed washing aperture with the two flexible opposing sidewalls, and with a cleaning material disposed on the outer surfaces of each of the two opposing sidewalls;
• grasping the handheld body with one hand of the user and compressing the outer surfaces of each of the two flexible opposing sidewalls with the one hand of the user and between the lower and upper joint with an external compression force to generate a dynamic position with a diameter of the enclosed washing aperture;
• inserting the two flexible opposing sidewalls into an opening of a bottle while in the dynamic position;
• releasing the external compression force with the one hand of the user thereby causing the two flexible opposing sidewalls to expand outwardly to generate a static position with the diameter of the enclosed washing aperture greater than the diameter of enclosed washing aperture when in the dynamic position and with the cleaning material on the outer surfaces of each of the two opposing sidewalls contacting inner surfaces of the bottle;
• and
• applying a downward force on the lower end of the handheld body to move the cleaning material on the inner surfaces of the bottle for cleaning.