How tuba is made
Gleaned from the internet:
Coconut palm sap is fermented to make the clear, white, sweet wine called tuba. To collect the sap, workers climb the palm tree in the morning and evening and bruise the coconut flower stalk until it starts to ooze its liquid. The stalk is tied with bamboo strips into a special bamboo container to catch the sap. Crushed tanbark from the mangrove tree is dropped into the container to give the sap a reddish color and to hasten its fermentation. As many as three flowers from one coconut tree can be made to yield sap. Each flower produces tuba for two months, after which it dries out and is cut from the tree.