[Debates the likelihood of his other keeping dangerous herbs in a Big Ben jar in the kitchen. Decides this is far likelier than it would be for most people, but still not *that* likely.]

If it looks like crumbled-up leaf in the bags, and not powder of cubic zirconia, I'd lay odds that it's tea, yes.

Oh, hold on, does he have the kind that comes in little balls, opens up as it steeps? I thought I had some performance tea off of the Emperor of the Shattered Sundial, look around.