take the sheath, leave the knife.
After you arrive in Cozumel, the first thing you do is go out and have a nice steak dinner, and "borrow" the steak knife. Yes, I agree "borrow" should probably be replaced with "steal", the nicer thing to do would be to either ask if you can keep the knife, or buy a cheap one.
If you are eating at the hotel you are staying in, they might let you have the knife.
After you arrive in Cozumel, the first thing you do is go out and have a nice steak dinner, and "borrow" the steak knife. Yes, I agree "borrow" should probably be replaced with "steal", the nicer thing to do would be to either ask if you can keep the knife, or buy a cheap one.
If you are eating at the hotel you are staying in, they might let you have the knife.