Next, it was important to contrive ways to use commonly used items for other uses. When living in evacuation shelters in contemporary urban spaces, various everyday items and waste materials are available, unlike when living in deserts or mountainous areas, where there is nothing. A cheap plastic umbrella, which can be bought at grocery stores may be used as a structural element of the tent. When three steel cans for beverages are connected together, their height is 350 mm, and a 2 liters size plastic bottle is 320 mm high. Both are just the right height to use as legs for the toilet seat, and by filling them with rain water or sand they can be used as weights to stabilize the whole tent.It was possible to appropriate such everyday items, due to the fact that these external dimensions, cap sizes, screw shapes, etc. are standardized to some extent to fit the shelves and vending machines in retail stores.