Jost mugs are the way ahead - just don't drop your Flt Cdr's on a bit of concrete! I think this why we have the word "smithereens" and I was a poor Fg Off for yet another month!
By the way, drinking from a Flt Cdr's mug is also ill-advised having seen what a well-hung Ulsterman did to one in the crew room following a disagreement with the very same Flt Cdr - very unhygenic!
LJ