raincoat

Some shops sell about everything and there you'll have to be to find a very cheap raincoat.
It's made of thin plastic and you need to be very careful when you put it on.
But it keeps you dry for one time use.

Why I mention it?

It's a very thin, small package and you can take it with you in your coatpocket or handbag.

For emergencies. Because it's not very environment friendly.