I addressed that possibility in an edit. Flow sensing is a bad way to determine how much detergent is left in a bottle compared to actually sensing how much det

I addressed that possibility in an edit. Flow sensing is a bad way to determine how much detergent is left in a bottle compared to actually sensing how much detergent is left. For one thing it forecloses refilling the container. Of course one of their primary stated motivations is e-commerce, so... Their geared rotational telegraph is cute and fun! It just doesn't look novel.