Don't buy any of the drinks on the beach that come in a hollowed out pineapple.  Funny story..... we had spent most of our Cozumel day on a beautiful beach under a palm leaf umbrella soaking up the sun, and snorkelling in the beautiful blue water and watching the waiters from the beach bar delivering hundreds of these drinks in hollowed out pineapples.  They looked so good but we stuck with bottled beer and soda pop and ice cream bars.  We waited until the last minute to go back to the ship and were literally the last passengers off of the beach and as we were leaving ALL of the waiters were digging the pineapples out of the garbage cans.  Hopefully they were composting them????????