Sonic, What's up with your foam cups??

I have been noticing for the past few months that my Route 44 styrofoam cups from Sonic in OKC have the annoying 'feature' that they leak through the pores in the foam. I have noticed this many times - and is it ever annoying. Here is a sample from the cup I am using right now. This cup is probably two or three days old, picked up at the Bricktown Sonic:

Those little drops look like normal condensation, but they are actually water escaping through the cup. I have to keep a paper towel under my drink at all times or else my desk will be all wet. In years past I could keep the cups for a long time and this would not happen. Very strange and not a little annoying.