Have seen this, might have to give it a try.  

 Im addicted to this stuff. I get the unflavored one and dose it with bitters. 

 Nice! Maybe will give it a try, pretty healthy as well right?  

 Yeah, it’s just carbonated mineral water. They have some flavored and some alcoholic but I just like the original. 

 I've started showing up to gatherings with unflavored Topo Chico, or occasionally the lime/mint flavored one.  It at least presents the possibility that I am joining in the "fun", although I stopped drinking alcohol some time ago, as well as anything with sugars, real or fake. I can forgive a tiny bit of lime juice, though.