Red Solo cups are more than just an iconic party staple – they're also measuring cups, according to some social media users. Robert Hulseman invented the red Solo cup in the 1970s for families ...

So quintessentially American is the red Solo cup, it is available for sale through a specialty website—Party Cups U.K.—targeting British revelers who wish to re-create the ambience of a land ...

Uncover the meaning behind the lines on a Solo cup, revealing their practical use for party-goers everywhere. Business Insider Subscribe Newsletters ...

CHICAGO (AP) — Robert Hulseman, who in the 1970s invented the Red Solo Cup for family picnics only to see it embraced as the go-to beverage holder at college keg parties and football tailgates ...

Update: Solo contacted us about the red cup’s line and told us this: Although the lines on our Solo cups match up pretty closely with common liquid measurements, they aren’t meant for that.