Occasionally you come across a bit of kit that is brilliantly simple yet works perfectly. The Grepe Card Safe is just such a thing.It is really nothing special, just a plastic box to put your memory cards in, but the manufacturers have actually thought about how people will use it.
If you use the "face up = empty, face down = full" method of organizing your cards then it's little windows that allow you to see the cards are rather useful; no need to open the case to see what it contains.
More importantly they are pretty shockproof, waterproof and they float. This came as an absolute relief to me when shooting at West Burton Waterfall, clambering about on the rocks I looked down in to the stream and saw my cardsafe slowly floating down the stream! Luckily I managed to grab it before it disappeared out of site, over the lower falls and out to sea. The cards inside were completely safe and dry..marvellous.
Highly recommended for the disaster-prone outdoor photographer.