The storage container (cistern, tank) is often the most visible or recognizable component of a RWH system. It is where the captured rainwater is diverted to and stored for later use. The main goal of the storage tank is safety. It should store water that is safe to use, and it should be secure so that children or animals cannot access the tank. There are several topics related to storage containers and you should go through each before making a decision on purchasing one. Please see each topic below.