Valuables on Aruba

Someone mentioned to me the other day that you can buy a special product which acts as a mini portable safe kind of thing. Like a small box or chest that you can lock your valuables in and rest easy when at the beach or whatever. Does anyone here use one?

I use the Pacsafe Travel Safe when I travel. It is about $50 but I see it is on sale right now. It may not look like much but the bag has some kind of metal mesh with canvas over it. It does give me a little bit of piece of mind.