I have saved (rough estimate) 1 billion cardboard coffee cuffs since buying this fabulous reusable one by Columbus fabric arts maven Amy Dalrymple. Its fabric is spun from recycled soda bottles. It actually protects my fingers from the hot, hot liquids I like to ingest. And she put an Ohio on it! A single is $5, but she also sells a pair for $8 just like those split BFF charms you had as a kid — only this one is a split Ohio.