Antonym of “dispenser”

Question

I've been searching a lot of dictionary websites for the antonym of dispenser. I was wondering if anybody could think of one.

Answer 1

Perhaps also withholder or inhibitor in the sense that a dispenser allocates/distributes/gives and a withholder or inhibitor would hold back or keep.

Answer 2

Collector works in many situations; one person dispenses information, another collects it.

Answer 3

Receiver or taker, I would say. Maybe even recipient or acceptor.