Some clever Caribou Coffee employee probably won a corporate sustainability award for this one. Too bad you can only get to this point of refusing the paper sleeve if you are boarding a flight in Denver. 
Bonus laugh: You can literally buy a reusable coffee sleeve on Caribou’s webpage for the low low price of $5.99. I can only hope this and the ‘hold the sleeve’ sign are creations of Caribou’s marketing whizzes, not their corporate sustainability officer, who thinks he’s doing his job. (Well, sadly, he probably would be. His job surely depends on making the planet notice people believe they are doing the right thing by drinking Caribou coffee.)
Bonus laugh: You can literally buy a reusable coffee sleeve on Caribou’s webpage for the low low price of $5.99. I can only hope this and the ‘hold the sleeve’ sign are creations of Caribou’s marketing whizzes, not their corporate sustainability officer, who thinks he’s doing his job. (Well, sadly, he probably would be. His job surely depends on making 
