I've got a rectangular blue one, with a button-on-a-spout rim, and my off-square slopey shoulder one has a sort of thick cup-shaped rim, (and a polished flat base), but I have no pure buttons.
The slopey one is slope-ier when turned 90 degrees around, it's the wide side facing you.
I've also got 3 very short ones - one blue, one tortoiseshell and one red and brown swirly. They're the only ones I've seen. John suspects they could be post-Harris - I'm not so sure, but perhaps that's my bias 'cos they're mine!

here's three of mine - including the thick cup-rim one. I'll have to get pics of the short ones and my rectangular one.
The
really tall one has a cork stuck insdie it. I don't know how it got in, I don't know what idiot put it in and I can't get it out.
Naturally, this was something omitted by the seller when I bought it.
Does anybody ever ask a seller if there is something strange stuck inside anything they buy? :spls: