More bad service
A few days ago we got a hot Cosi beverage to share in Jenny's large mug-- we often just carry around our own mugs to save paper cups. So, we're sitting in Cosi close to dinner time drinking from our own travel mug. There are other people sitting there just drinking beverages, not ordering anything-- lots of other people just drinking beverages. The first Cosi worker comes up to us and explains that they're getting busy and only Cosi customers can sit there. We explain that we used our own cup to help out the environment but the beverage inside is Cosi. She leaves. A second Cosi worker comes up a few seconds later and says the manager spoke to us, and she's explaining again that we need to order something. We explain again that although the cups is ours, the beverage is theirs. She leaves and they give us a few more suspicious looks and we leave.
So, either don't go to Cosi, or save your receipt.