It's obviously the 24/7 librarian bit of me, but as soon as I read Mrs Pouncer's reminiscences on the Caramac bar over at
Kevin's Commonplaces I felt the urge to google and see what I could find....

Thanks to the wonder that is t'interweb you can
learn about Caramac,
Buy Caramac..and..um...well, actually, I'm not sure why you'd want one of
these.