I followed a tutorial that I originally saw on Sew Mama Sew last year to make this origami water bowl for pets. You can see the tutorial here on Craft Stylish. You use oilcloth and simple folding, plus a little bit of sewing! I made it for my Dad and his wife who look after other people's dogs when the owners go on holiday. And of course for their own dog, Frodo, as well!
You can fold it up as much as you want it still springs back into shape!
Think I might make some of these for the next local craft market: