We've been tootling along quite well with a tall and skinny pedal bin in DS's room, emptying it every 3 days or so, but now he's well established on solids the room is starting to, well, hum a bit. I know some people take dirty nappies straight to the outside bin, which is laudable, but I'm far too lazy to do that that isn't very practical for us.
Gotta laugh at all the people thinking they're saving the environment by flushing the poo down the loo and using gallons of water in the process!! It's six of one and half a dozen of the other.
Seriously Elphaba - having a dedicated big bin with heavy duty liner just outside the back door is fab. Works great for me as hail, rain, snow - whatever it can go out as I don't even need to put shoes on! Then you just transfer to the wheelie bin when needed!