How do you store your yeast?

I store my yeast in fridge in a small bottle if I have open them and not used all (in this case I try close them as good as I can afterwards). Every time I use a yeast I clean it by ethanol.

As I normally  brew a volume of 10 liters equaling ½  pack for ales and wheat beers, then I store them in the bottle to separate a bit form the environment of a many time open fridge. I try to use the rest of the pack in 1 – 2 months then.