How to keep track of which wine is in which glass? Stem tags, paper place mats, or even water soluble markings on the glasses all do the job just fine.
But ultra high-end Kenzo winery has a more elegant approach. Etched into the base of each of their glasses is the name of the wine. No confusion, no unnecessary pieces of paper. It won’t work for a blind tasting, but it’s a sleek touch for comparing a winery’s best bottles.