I don't see why not. The knowledge may prove to be useful.

[Plus, the more this girl spoke, the better idea Kikyo would get as to who she was, what would make her tick, and how to perhaps persuade her to help her in the future. Though with her offering her assistance already, it seemed likely she was the altruistic type and needed not much convincing.]

How about this one?

[It was a cardboard juice box.]