Young Thai coconuts are delicious and pretty easy to deal with once you get the hang of them. Wen you see them in the stores they are rounded with slightly pointed tops. The point tells you where to open them. You want to cut into them 2-3 inches from the tip. You're basically paring away the outer hull to get to the shell over the center. Once you've exposed the rounded shell use the base (heel) of your knife to flick it open. Voila. You'll never have to drink canned coconut water again.