Cool! I'd definitely buy coloured if it was here!
Btw, for those of you who buy the regular stuff, I bought a 10l bag from my local petshop, Pampurred Pets, for £2.99 (usually £3.99 there - its currently on offer). I know you can get it for that price on the internet, but don't have to pay for postage (or as I seem to do instead - buy lots of stuff to get free postage!
). Pampurred Pets is a chain, mostly in the south of England, in case you're not familiar with it.