THE latest issue of grocery trade magazine Shelf Life has a most interesting little story about the sort of soft drinks now on sale in Prague. One energy drink comes with the name Erektus and, yes, the design on the can is... somewhat graphic. Another energy drink is called Semtex Forte - an explosive concoction, no doubt, as is another beverage called Bubblegum Dynamit. But then maybe the Czechs think a drink called Virgin Cola has a strange name.