According to Ayurveda which is the medical system of yoga. You should store your water in a COPPER vessel because it adds prana ( life force energy) to the water. There are also many health benefits to copper.
Water is a very complex material and should be treated with respect and reverence. Where there is water there is life. When we drink water it becomes a part of our body. The process of turning water into a human is no small feat. According to Japanese scientist Dr Emoto when the water is treated with respect it forms crystals. These crystals are high energy molecules.
So if you want the most out of your water store it in a copper vessel and send messages of love to it also centre yourself in a loving place before you drink it to get the most out of the water.