I'm selling my free Yubikey MtGox code

[NothinG]

those are nearly indestructible

[John (John K.)]

those are nearly indestructible

They'll destroy the surface it's dropped on, unless you're unfortunate to drop them on an Abram.

[jarsumarsu]

I've dropped mine into a puddle and it's still going strong.

Perhaps this press release will alleviate your fears: http://www.yubico.com/YubiKey-washing-machine

Yes, thanks. My wife usually washes everything I forget in my pockets.
The last item she washed was my son's Nokia cellphone. It died. 
It seems that the Yubikey will survive after washing machine

They are pretty much unbreakable, unless you crunch them with pliers or something. I usually hang my entire keyring of 20+ keys off of it when it is connected to my computer, and I fear for the USB port more than the Yubikey.
Put it on your keyring, then you shouldn't lose it.

Ok, thanks for the advice