***Update: Due to local activity in the area, I will accept a photo log of the mini-mountain***
You're looking for a white PVC tube that's been capped on each end. It's about the size of an average pill bottle. This one is needlessly magnetized (I couldn't find a magnetic surface to stick it to.)
Upon arriving at the stunning Daku Island beach (in my opinion, the most beautiful swimming beach in Siargao), take a few minutes to enjoy the beauty; take a swim and cool off... and then excuse yourself to explore the village.
The village children will greet you cheerfully and ask your name. Continue walking up the coast until you get to a gateway to well manicured Bermuda Grass lawn. This is public property, don't worry. You will see others walking along the pathway. A beautiful white beach house is on the right and you will see an oddly decorated tree.
Continue until you pass by a tree with strange fruit and enter into a coconut forest. If the season is right, small white magnolia-like flowers are all over the forest floor.
Enjoy the cache and natural beauty of the island gem!