Chukamen noodles are made from wheat flour kneaded together with egg, salt and a special kind of carbonated water. The noodles come in different styles, the most common being long and cylindrical, but there are also curled and flattened varieties. Chukamen are most commonly served in soup in the hugely popular dish ramen, which has three basic flavours: soy sauce, salt and miso. Ingredients such as pork, fried vegetables and seaweed are often added. Chinese noodles are also served cold in summer in a dish called hiyashi chuka.