Originally Posted by Nothin but blue skies
Msmarvel - at the risk of sounding stupid, what is a water locker please?
Probably not the best (or right) name for them. lol They're also called dry packs. I think you can google dry pack and you'll find them. They're either little plastic boxes or tough plastic bags that will keep your stuff dry while you snorkel/swim - they either attach to a lanyard around your neck or a belt.
So, depending on the size you get, you can bring your money, credit cards, cell phone, room key, etc. with you while you're in the water rather than "hiding" it in your shoe on the beach. Good if you're by yourself or if everyone in your group is snorkeling, diving, swimming at the same time.