That would be a different test, methinks? You're assuming that the taste is only affected by what it's being served in, not how the liquid was transported. For

That would be a different test, methinks? You're assuming that the taste is only affected by what it's being served in, not how the liquid was transported. For all we know, aluminum imparts some sort of off-flavor into the Coke itself that the OP doesn't like, in which case it wouldn't matter if he decants it into a glass first--it would already have been "tainted" by being held in the aluminum can.