For those who are real wine enthusiasts, Vacu Vin has produced the Glass Markers Classic.
These new glass markers are designed to look like wine seals. Every wine has its own type of grape. 
That is why every glass marker features a bunch of grapes that refers to the wine. 
The unique ‘wine seals’ attach themselves with a suction cup to any smooth surface. 
Give every guest his or her recognition marker by sticking one onto their glass.