Both of my grandparents had them, not sure if they still do. Places used to have like .50 refills and didn’t list size limits, so Muricans started to buy and make bigger and bigger tubs to fill with liquid sugar.

There are levels of “functioning”, and most of these people probably couldn’t be called “fully functioning.” More like semi-coherent, only technically self-aware flesh blobs that somehow continue to have a pulse.