In Sanatana Dharma, it is believed that a pure copper vessel is used not only for ritualistic purposes to store water, but to let the copper get infused with it to make it auspicious and medicinal. CR Achmani Uddharani Nagam Rod is a trusted source. The Uddharani is paired along with the Panchapathram and used for storing and dispensing holy theerthams in homams, poojai and rituals. While doilng Achamaneeyam, one has to take only the quantum of water. Small Udharini is used at home and big size is used in temples to distribute Pooja water, Abisheka Theertham, Sripaadha Theertham to devotees at temples, mutts and home.