"Binulo" from the word "bulo" which refers to the young bamboo is use for cooking in a traditional way. Aetas still cooks with bamboo especially for those who are staying in the uplands.
In this Video, Rice is cooked in such a young bamboo.
Aetas are known for their being nomadic so they just build shelters out of tree branches and banana leaves as a cover. During their stay in the mountains, the bamboo trees serves as one of their survival tools such as glasses, spoons, cooking device, produce fire, weapons and others.
Pampanga: https://www.pampangatalents.com/pampanga.htm