Nissin Foods, the company that invented instant noodles, appears to have created an entirely new category with a hit product: cup noodles made with cold water.Initial supplies of the handy meal – available in Spicy Kimchi and Chicken Salt Lemon flavours – sold out a week after hitting store shelves on July 20, according to Nissin. While the Tokyo-based company did not disclose sales figures, it had anticipated supplies to last one to two months.Nissin, which has almost half of Japan’s...