Guests might forget their wine glass charms but they won"t forget their name. Made in the USA, our green, blue and purple Wine Glass Writers come in a set of 3 festive colors to complement any occasion. Simply write your guests name on their wine glass, let set for 2 minutes and you will never pour out someone"s wine. Wine Glass Writer is a special patented non-toxic ink for use on glass/crystal, and glazed ceramics. 100% Made in USAdries in 1-3 minutesstays on for life of partywashes off with soap+waternon-toxic, patented ink for all glass, crystal, or glazed ceramics