mocktini
n.— «Serve the best with this smooth mocktini. It’s always in good taste.…Half-fill martini glass with tonic water, then top off with lemon-lime seltzer. Add lemon twist.» —by Frank Thomas, Karen Lancaster Brown The Mocktail Bar Guide: 200 Recipes for Safe and Sober Parties Sept. 25, 2001. (source: Double-Tongued Dictionary)