Little seems to like her lidded one, except when she decides that behind the front door is better :-(

Blue and pink are equally familiar/unfamiliar for the boys since they were set out for them before they arrived. I did wonder if the blue one still smelled slightly of other cats, as I think we've had it since we had 'Strophe and Co. But fifteen years sat out in the back garden and a thorough disinfect ought to have removed all traces.

Removing the anti-splash guard is certainly on the cards. It's not as if they need it: I've never met such well-mannered tidy animals before.