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Would you spend lots for a real underwater digital camera vs buying lots of disposable underwater film camera?

We are going on a Caribean cruise. We want to take underwater pictures of our snorkeling adventures. We have the choice of buying lots of disposable underwater cameras or buy one decent real digital camera. Is the image quality of a real digital camera worth the $250 vs buying several $12 disposable cameras? Basically how good are underwater disposable cameras?