We've never had a problem on any of our visits to Cozumel. I've eaten food on
DCL excursions and private excursions and never had a problem. Chips and salsa are to die for. And we had the best fajita meal ever in Costa Maya.
Hmmmm.....just thinking about those meals makes my mouth water.
Of course I'm spoiled, can't find anything as good at home.
Stick to bottled water, bottled soda. Ask for no ice if you want to be super cautious.