Or I've read you can make drinks look like drinks that aren't drinks. Have a diet coke/coke but no alcohol in it, but dress it up like a cocktail or dump out a bottle of beer, rinse it out really well (maybe put it in the dishwasher) and just drink water from it all day long.
I have a similar dilemma coming up as I will be going to Switzerland in February 2015/March 2015 and traveling with my Aunt who knows my weakness for wine, and loves to drink wine. I'm not sure how I am going to get through that vacation without drinking either.