The corrugated cardboard ring slipped onto a hot coffee cup began with one bad morning in 1991. Jay Sorensen, whose career had stalled after a run of ventures that never clicked, was driving his daughter Ryder to school when a drive-thru cup proved too hot to hold and spilled into his lap. He saw a flaw the whole industry had accepted: paper barely resists heat, and cafes were fixing it by double cupping, jamming one cup inside another and burning through inventory twice as fast. His answer was a sleeve of fluted paperboard that touches the cup only at its ridges, trapping pockets of air in the valleys the way a double-paned window insulates a house.

After years of prototyping to fit tapered cups, Jay and his wife Colleen debuted the trademarked Java Jacket at the Seattle Coffee Fest in 1995, just as styrofoam was falling out of favor and hot espresso drinks were going mobile. Orders flooded in, and he secured his patent that same year. Then the giants arrived: International Paper, LBP Manufacturing, and Starbucks with its own patented coffee clutch. Sorensen survived by owning the independent cafe market, and the sleeve turned into something he never planned, a cheap printable billboard for small shops that could never afford custom cups.

• Double cupping could waste hundreds of thousands of cups a year at a single busy cafe.
• The sleeve revives the zarf, an ornamental brass, silver, or gold holder once used for handleless coffee cups in the Middle East.
• Competitors had to change corrugation direction, adhesives, or switch to dimpled paper to avoid infringing his fluting patent.
• Java Jacket remained one of the top four coffee sleeve makers by volume in the United States.
• Custom cups can require minimum orders of 50,000, while a few thousand printed sleeves let a mom and pop shop brand every drink.