Nipa palm vinegar is made from the sap of the leaf stalks of nipa palm. Coconut and nipa palm plantations are also important. Dubbed "The Bamboo Jamboree" due to the prevalence of bamboo and nipa palm. Some other fruits that can disperse via water are nipa palm and screw pine. The houses of commoners had thatched roofs (nipa palm leaves). This makes nipa palm vinegar slightly sweeter and less sharp than coconut vinegar. Cogon grass, Nipa palm leaves and coconut fronds are used as roof thatching. Mangroves or "lamu" and nipa palm or "dani" are the major vegetation of the delta. The nipa palm produces a very high yield of sugar-rich sap. Nipa palm sap has a relatively high sugar content, containing 15 to 22% sugar. Like other types of vinegars, nipa palm vinegar is used primarily in dipping sauces ("sawsawan").