You could really turn the tension up a notch by using the relative value of the properties to rate the quality of the wines you’re served.
Alternatively, use them as they were intended to be used by simply remembering which one is yours and marking your glass with it. Dull, but it works. Assuming you don’t get so drunk you forget which property was yours.
Alternatively again, you could buy ten sets and hide them under the bed for when they appreciate in value in the years to come.