P is for Pratas, Portugal, but not Plastic!

I picked these up at the races! Totally new to me, and while Brain Carrick did know them, he couldn't remember the name, as he had sent them to someone else and eased the data out of the mental pending tray, if you know what I mean, anyway, I digged a dugging and now think they are Pratas a family firm (the Pratas family), who have apparently given their name, as the generic 'pratas', to all