How would it turn Red from being in red wine bottles?
That makes no sense.
They would have to be stupid to use bottles with any liquid in them, and glass alone is not going to effect it. It sounds like a pretty terrible way to try and transport drugs
. I could understand maybe one or two empty bottles in every few cases full of MDMA
that was professionally sealed to help prevent it being ruined from heat or moisture, but no one is dumping valuable drugs into bottles of vino.
It sounds like your friend is just trying to sound like he knows stuff.
Its more likely that either food colouring was added to make the product stand out, or there were some impurities in it.
Regardless, it has to be tested.