1. Prior to the party wash and remove labels form each of the bottles.
2. Spray each bottle with the chalkboard spray paint.
3. The day of the party, set up a table where the guests will be able to decorate their bottle. Set out the bottles and the chalk.
4. During the party invite your guests to select a bottle and add their own artistic flare.
5. After everyone has decorated their bottle, let the guests decide winners of the categories that you select; such as funniest, most artistic, most unique. Award prizes to the winners.
6. Let your guests take their bottle home as a souvenir.