The LapStacker® is the world’s first retractable strap system for wheelchairs used for carrying items on your lap. Tinka Design has designed and engineered this product from an emerging idea through to manufactured product. There were some significant design challenges due to the many different wheelchair makes and models available. It took considerable effort to develop a simple, lightweight, yet robust system that was able to fit to nearly all wheel chair models. This project used a variety of materials and manufacturing processes. Injection moulding, over-moulded TPU, sheet-metal stamping and forming, extruded aluminium profiles, fabric materials construction and card packaging were all used in this one product. Tinka Design played an important role in taking observations from the user and their experiences and translating this into a functional and easily manufactured solution.