It’s not necessarily a garbage project, but this wineglass scheme has to have been the brainchild of someone struggling to use up the last of a quart of chalkboard paint. The idea here is that your party guests can write their names in chalk on the bases of their glasses to prevent mixups.
Wineglass-identification systems are of course both lovely and highly necessary, but this sets a new bar. Are your guests really so bad at wine drinking that they need to be symbolically sent back to school? At least they can run through the times tables when the conversation hits the wall. Which will be soon, since your guests are the type of people who are friends with someone who spends their time dreaming up ways to use leftover chalkboard paint.