[Hanno Spoelstra]

It is over-engineered like the Rolls-Royce engines it was supposed to fuel. So it is a matter of keeping up appearances like the British do.

Plus it alleviates the crew from having to hold the excellent German invention while being emptied - it holds two cans sitting upside down emptying themselves so the crew can brew up in the meantime.

All in all a very British piece of kit!

H.