Somewhere, there must be a regulation that says that the volume of beers must be indicated very precisely in Europe (or only in Switzerland?) to avoid any ambiguity:
On the other hand, this excellent idea does not seem to have been implemented yet (click for a better view):
I don’t get it. What is defective about the latter poster?
As far as I know, no producer of coffee provides any written warranty about the theorem-proving effects of their products…