Good review Alan and definitely usable as Civilian Jars.
Rum issue was always something I associated with WW1 but heres a couple of photos from IWM showing rum being issued in WW2.
Men of the 1st Queen's Own Royal West Kent Regiment enjoy a tot of rum in a section of trench named 'Pudding Lane', 4th Division near Roubaix, 3 April 1940.
While a piper plays, a special rum ration is issued to men of the 2nd Royal Inniskilling Fusiliers to mark St Patrick's Day in the Anzio bridgehead, 17 March 1944.