We disclose a method of providing a user or a healthcare worker with an ostomy device that is shape-adjustable to conform to skin around a stoma associated with a bulge or a hernia. The ostomy device is configured to invert from a storage configuration to a use configuration by inverting a substantially convex shape of a proximal side of a base plate to a substantially concave shape and stabilizing the base plate in the use configuration by contacting the inner radial periphery of the reinforcing structure with a distal surface of the base plate.