I have been analysing different pump technologies and sterility for transporting the insulin. I have finally decided on the technology and best configuration available. I have been studying different piezoelectric pumps and contacting manufacturers. Using a cartridge based or standard piezoelectric pump in a cartridge form with the needle mounting element all in a disposable part enables the actual pump body to contain a far greater chamber for insulin as well as the battery and circuit board parts. I am now moving on developing the form of the pump thinking more about its appearance and interaction with a charging hub.