Drawing on existing design approaches, this paper argues for the experiential desirability and critical importance--in terms of environmental sustainability-of designing for reflection on everyday material things themselves. This paper motivates and proposes a material awareness design approach, further drawing on developments from philosophy of technology and design theory. A series of conceptual designs are presented to help illustrate this approach. Keywords Sustainability, reflection, design, material awareness ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): Miscellaneous.