Adhesive and peripheral systems and methods for medical devices

A system comprising:

• a reservoir comprising:
• a resilient cylindrical flexure portion that is able to expand and contract to change an interior volume within the resilient cylindrical flexure portion, wherein the resilient cylindrical flexure portion comprising a first end and a second end;
• a central tube within the resilient cylindrical flexure portion extending from the first end to the second end of the resilient cylindrical flexure portion;
• a collection chamber directly connected to the central tube;
• a pumping chamber coupled in fluid communication with the collection chamber and the central tube, wherein fluid flows from the collection chamber through the central tube and directly into the pumping chamber, wherein during a pumping mechanism's compression stroke, a pumping actuation member applies force directly on to, and deforms, a collection chamber wall forcing fluid to flow through the central tube and into the pumping chamber;
• and
• a reusable housing assembly adapted to be secured to the reservoir, the reusable housing assembly comprising a volume sensing device, wherein the volume sensing device determines the volume of fluid delivered to the user.