If you visit any grocery store, you’ll notice the sparkling water, club soda and seltzer aisle has exploded with new brands and flavors coming out seemingly every day. But before La Croix, Spindrift, or Waterloo, my husband and I became obsessed with sparkling water during a trip to Argentina two decades ago. Restaurants offered the option of still or sparkling water, and our friend who we visited there, always opted for sparkling. All of sudden, still water seemed, well, flat, while sparkling seemed vibrant, like the Argentine culture around us. Once we got home, we began buying flats of sparkling water at Costco. Then SodaStream came into our lives and we never looked back.