Rubha Charnain 1
Image by goffik

Personally I'd leave them up Mr G.
I've just checked CANMORE for the site Margaret showed me and they've got 'em listed so I've added the site
http://www.themodernantiquarian.com/site/8410

Hi Folks,
It looks as if there's a ring around the cup:
http://www.themodernantiquarian.com/post/47277
In that case the cup-theory becomes more plausible.