Against the backdrop of a climate crisis, HCI researchers and designers are reflecting upon, reconsidering, and re-imagining the work that we do through the lens of sustainability. In this Studio, we propose to adopt this critical perspective to Sustainable HCI through an examination and reflection on the environmental impact of research conferences. Our Studio builds upon our prior work that explored sustainable methods and toolkits for facilitating data physicalization workshops. We apply the tools and strategies developed through this prior work within a Studio in which participants are facilitated to engage with, reflect upon, and create with data relating to the sustainability of HCI conferences such as Tangible, Embedded and Embodied Interaction (TEI). Through the creation of data artefacts that can be displayed, worn, or shared throughout the conference beyond the Studio, we aim to spark wider conversations about the environmental sustainability of TEI2024, as well as HCI conferences more generally.