This is a self-supporting & self-rising, flexible and collapsible tank for the storage of various types of liquids. Being very light in weight compared to metal tanks of similar capacities. and also being collapsible, they can be easily transported from one location to another and can be put to use immediately. These water tanks are commonly used for the storage of water for drinking purposes in deserts, strategic military areas and construction sites, disaster management areas, picnics, etc. These tanks can also be suitably modified for the storage of effluents and toxic waste liquids in case of emergency or even Petroleum Products.