What happens when you lose the hose of a vacuum cleaner, and the only spare you have is off of another older vacuum you have? You could perhaps order a brand new hose from the manufacturer, or you could design your own 3D model of an adapter which would connect the old hose to the new vacuum. this is exactly what Benjamin Bios did via his 3D printer. This goes to show how 3D printing is eventually going to change our everyday lives if it has not done so already. Here are some images of the adapter Ben printer out: