The Hidden Design of the Red Solo Cup The red Solo cup is an American icon, common at parties and gatherings. Beyond its simple appearance, its horizontal lines serve practical purposes. The Purpose Behind the Lines The lines provide rough measurement guides: Bottom (~1 oz.) – Spirits, Middle (~5 oz.) – Wine, Top (~12 oz.) – Beer/Soda These help with portioning, responsible drinking, and convenience. More Than Just Measurements – Beyond portioning, the lines contribute to responsible drinking by enabling users to monitor alcohol intake. They also enhance the cup’s design efficiency, allowing for easy stacking and transport. Despite these benefits, many remain unaware of their function, as the lines are not widely advertised. A Cultural Icon – A staple in media and social events, the red Solo cup is more than just a cup—it’s a symbol of fun with a thoughtful, functional design