There are some commercial rolls I've seen in the US that seem to be a happy medium...the holder itself in the stall has a thin plastic rod for the TP to go on, and the rolls have a very small opening in the center (and no cardboard) to go on that rod.
There are some commercial rolls I've seen in the US that seem to be a happy medium...the holder itself in the stall has a thin plastic rod for the TP to go on, and the rolls have a very small opening in the center (and no cardboard) to go on that rod.