The fanciest drinking waters, from £52 to £72k for a single bottle Plus, the Royal family's favourite water since 1985. But is there really a difference between them all? How posh is your water? Credit: Getty Images “Someday, before I die, I would like to try… seltzer water,” Seth Rogen’s character confesses to Sarah Snook in An American Pickle, the HBO comedy-drama film. Seltzer water is, of course, sparkling water: a beverage of many debates. The unofficial stereotype is that posh folks drink (even prefer) sparkling water as opposed to still, due to the little bubbles rising up resembling those found in champagne. A six pack of San Pellegrino sparkling water costs 50 pence more than Fiji Water.