Worth running through the room rather than the bowl as well, since irritants produce the same sneeze. Aerosols, perfume, cleaning spray, scented candles, plug-ins, smoke of any sort, and feather dust if there is a tiel or a cockatoo in the house.
The tell is timing. Sneezing right after a drink is the bowl. Sneezing while you are cleaning or spraying something is the room. And keep her well away from an overheating non-stick pan, that one is not an irritant, it is lethal.