Puto bumbong, a Filipino delicacy, is a type of puto or rice cake named after the bamboo tube in which it is steamed. It is unusual among puto, being sticky and having a long thin shape and purple color. The elongated shape results from the method of cooking while its color comes from the violet pirurutong rice it is made of. It is served with grated coconut and brown sugar. Along with bibingka, it is often served outside churches around Christmastime. [SOURCE]
A man carefully prepares bibingka, a type of rice cake from the Philippines traditionally eaten during the Christmas season, as its mixture poured in a terra cotta container is being cooked in between preheated coals.