There’s a way to keep your water cool without electricity: Hello, terracotta. It’s alkaline, porous and natural, keeping the heat away. What’s more? The cool water doesn’t leave you with a sore throat and is wholesome to drink.Before you make its debut, soak Terracotta overnight so itï¿½s good to go. Wash it with a mild detergent and dry it before each use. And itï¿½s ready for ovens, microwaves, serving. It can’t be used for cooking on flame or on induction.