Great idea but I had a problem with the tight seal and efficient drying function. We used it on a recent beach vacation and I was able to slip my room key, credit card and a few bucks into it. (They could all withstand water. I tried for a few days, but no matter how well I thought I had sealed the compartments, I ended up with a pile of wet bills after going in the sea or pool. It is effective for storing things but I was disappointed that it didn't stay dry.