The true ultility cashstash is an interesting device. It is a simple hollow cylinder made out of aircraft grade aluminum, with a screw top, and a rubber O ring at the joint between the top and the bottom. This is attached onto a keychain. Inside the cylinder is a clip.

The aim of this is so that you take say a £10 or something, and fold it in a certain way (instructions on the back of the packet), and thus you can carry extra money with you.

Ok, price? I got mine including delivery for around £5-6. This was back when the thing was pretty new, so I am not sure if you can get it cheaper now (but on ebay there are loads of "rip off" versions for cheaper, I have no idea if these are any good).

Durability? VERY HIGH. I once fell off my bike and onto my keys. Some of my house keys, keychains, etc were totally wrecked. However the aircraft grade aluminum on the cash stash barely got stratched! SOme of you may say how do i know it took any force, well the ring it was attached to completely cleaved in two! ALthough this thing is made out of very thin metal, it is unbelieveably strong. ALso its waterproof (never tested this, but it is certainly never wet on the inside even when in rain, I think this is down to the O ring). Also, unlike other keychain gadgets I have owned previously, it doesn't just dissassemble itself in your pocket when you are busy doing other things.

One thing I would say is that the steel clip inside doesn't feel as well made as the rest of the device, which is a shame. Apart from that I would say that this item is a sort of rolls royce of gadgets.

So is it useful? I have used this on many occasions, from not having enough cash to pay at a restaruant, to loaning friends a tenner, to paying for a cinema ticket and making sure I had cash to get the train home. The orignal reason I got it was so say if someone robbed my wallet, I would still be able to at least just get home without having to worrying about logistics.

I would recommend this, even if it is a bit pricey for what it is, its one of my gadgets which has really stood the test of time.