My design group for a class project went through the design process creating this collapsible cup. We began with concept generation based upon what customers wanted from a collapsible, portable cup. Based upon customer demand, we chose the best design that has three twistable pieces (for assembly) put together with threads and rubber gaskets to ensure no leaking. The lid was also added for convenience and easy storage (so that leftover liquid when collapsed does not escape). A stress analysis, house of quality, heat transfer analysis, decision matrix, and bill of materials were also all made. The primary material used is 316 stainless steel and the lid is made from delrin (plastic). More detail can be seen in this video.