Would it (or another size pac) fit the Cybook with the cover? I'm thinking of for when I have to commute on rainy days, I'd love some extra protection. I wouldn't want to risk travelling without the case.
I would use it solely for rainy days, not for baths or anything else like that. (Maybe if I owned a larger tub, but I can barely fit in the one I have. Not comfortable for long baths.)
