When you are at a party with red Solo cups, you have marker so you can keep track of your drink. For wine parties they have the little dingily things to clip to stem of your glass. Well I like beer and even when not drinking beer my preferred glass is the standard pint glass. But I hate when there are a bunch of people over and I loose track of my drink. With this easy to print part, each person can have a personalized marker for their glass and still get to enjoy their ice cold beverage from a nice glass, not just a plastic cup.