Ideally, the connection piece is made from a material that is recycleable. In the best case the material is bio-degradable so that the users can easily discard of the broken pieces themselves. In this case the users can feel that they actively contribute to sustainable consumerism. This is a advantage over recycleable plastics.
The dogbone shape of the connection piece allows for easy production if it were to be produced with a material that can be extruded. The extrusion profile can be cut into single connection pieces as illustrated in the picture below.