I fly out of MCO every other week or so to DC. This morning I was on the 6:30 am departure to ATL and the TSA was at the gate. When boarding they were pulling people out of line that had a starbucks in their hand and waving a stripe of paper over the opening of the cup. I have never seen this before. Anyone else seen this and what in the world are they testing for? Monitoring to ensure the coffee is hot enough??