Easily open a Thai coconut with an ordinary kitchen knife! The first step is shaving off the top of the coconut. You are going to cut through the white outer layer to the brown skin that is underneath. Take a very sharp knife and start to carefully cut off the skin, kind of like peeling an apple, but tougher and more fibrous. For the top, cut deeply until you expose the brown inner layer of skin. Cut all the way around the fruit without going too far in. Keep the white outer layer on around the rest of the coconut. once you expose the top brown skin, you can "pop" the top right off with the knife by hitting it with the sharp end of the knife until it "pops" open. pull it off.