Unit of liquid capacity, the value of which depends on the liquid being measured. It is used for petroleum, a barrel of which contains 159 litres/35 imperial gallons; a barrel of alcohol contains 189 litres/41.5 imperial gallons.
Blue expresses patriotism and noble ideas. Red denotes bravery. White symbolizes peace and purity. The stars stand for the three island groups: Luzon, the Visayan, and Mindanao. Effective date: 25 March 1936.