The Mason Jar Shot Glasses are a great gift idea for your alcoholic grandfather who just can't bring himself to drink out of anything that doesn't bring his mind back to the 50's before he has shitty grandchildren like you, or your local hipsters that refuse to drink out of anything that is not a shoe, dog bowl, or mason jar, or for your baby who is too cool to drink it's booze out of normal drinking glasses. The Mason Jar Shot Glasses come in a set of 4 jars, are made of glass, and are not dishwasher safe, so only hand wash these mini mason jars.