Salt two highball glasses and squeeze the the juice of one lime directly into each glass, using whatever juicing tools you have at your disposal to get all the juice. Add 2 shots of tequila and and 1 shot of whichever orange-flavored liqueur you prefer (Grand Marnier is slightly less sweet than the Patron Citronge, each yielding a slightly different flavor) to each drink. Top off with mineral water and serve.