In this talk we present a method for sharing collaboration unaware VRML content, e.g. 3D models which were not specifically developed for use in a distributed environment. This functionality is an essential requirement for the inclusion of arbitrary VRML content - as generated by standard CAD or animation software - into teleconferencing sessions. We have developed a 3D TeleCooperation prototype (TeCo3D) to demonstrate the feasibility of our approach. The basic services provided by the prototype are the distribution of collaboration unaware VRML content, the sharing of user interactions, and the joint viewing of the 3D models. Our approach relies on existing VRML browsers as the VRML presentation and execution engines while reliable multicast is used as the means of communication to provide for scalability.