This document proposes a Design Collaboratory to help members of the Sustainable Brands community better understand, leverage, and utilize design tools for sustainability through a three-phase approach. The phases include: 1) Sharing existing design tools between members, 2) Exploring how companies integrate design and sustainability, and 3) Developing best practices for scaling the use of design tools. The goal is to gather existing tools, identify opportunities to improve the adoption of design thinking, and create resources to accelerate the broader use of sustainable design.