If you save the World of Felix vouchers on the boxes of Felix cat food then you can donate them and 48 tokens will provide a fleece blanket for a cat being looked after by The Cats' Protection League.
I normally throw them away but when I found out they can do some good I will now be donating them - I have enough for 3 fleeces already thanks to the brilliant Pets at Home deal on here earlier this month!
I just thought I'd spread the word.
Just have a look here: http://www.worldoffelix.com/
and look under 'Felix's bits and bobs'.