The Green Fudge

For the second consecutive year, I've made green mint fudge for St. Patrick's day. I'm taking it to my uncle's St. Patrick's day party tonight. I took all the ingredients (sans butter and sugar because I knew there was already some there) over to my grandmother's house yesterday, so that I could spend more quality bonding time with my mom. My mom suggested to use my grandmother's green food coloring rather than waste my own because "she's had it a long time." She proceeds to pull out a glass McCormick bottle of green food coloring. I make some smart ass remark like "wow, it looks like its from the 70's." Upon further inspection, we discover that the bottle is dated 12/69. Guess she did have it for a long time.