The Mares Dry Box (like an Otterbox) and Personal Dry Box (egg) are interesting.
My computer must be on the "b" list though. I found the egg at Mares--but there are no reviews of it yet, indicating it is new and unpopular and untested perhaps--and the first US web site where I found it, had no technical specs (like size or depth rating) but curiously said WE AREN'T ALLOWED TO SHIP THIS TO YOUR COUNTRY. Hmm, that would be...the same country they are in, the US of A.
Almost sounds like the electronics industry, advertising things that don't exist, to see if there will be a market for them before they start making them. And it looked so reasonable!