In this project, we investigated how devices with rollable displays can be used for collaboration on-the-go. We developed a theoretical framework for designing user interfaces for this new class of devices. Based on this framework, we contribute a first implementation that supports users during mobile meetings. First evaluation results show that participants use resizing not only as way for adjusting the screen real estate, but also as a way for dynamically adapting their social distance during the conversation. Our results moreover indicate that jointly holding a resizable mobile device is promising for collaboration on-the-go, since it creates a strong connection between users while retaining flexible physical arrangements and flexible spacing of users.