DC-900250-1.2, Duracast 250 Gallon Plastic Water Tank | 900250 It never hurts to have extra water stored in case of emergencies. Be better prepared and store water using these plastic water tanks. Made with FDA approved polyethylene, Duracast’s plastic water tanks are safe to store potable water for long periods of time. If you live in an area where droughts are common occurrences, these tanks are a perfect way to help you use stored water during a dry spell. You can use the water to keep your garden alive or to maintain your green yard. If using tanks to store drinking water, be sure to choose either the black or green colored tanks. The dark colors will slow the growth of algae and keep your water fresher longer.