Marsupial is the foldable city bike, not only does it serve as a vehicle but it can also serve as carrying bag when folded. Intended for those who prefer bicycle as a mean of transportation when going to work, it has to offer even more than just that. While observing human routines i realized that people often visit grocery stores after work. With Marsupial people will not have their bags hanging on the steering wheel since it can make driving difficult and cause accidents. It will provide safe transport for people and also for groceries. Groceries will be put into the folded bicycle and like that will be transported home. Marsupial has simple design; in accordance with purpose it’s a bit vintage. Bicycle frame is made of aluminum, while bag is made of leather. Bicycle is lightweight, and folding is fast and simple.