Please give me words that describe a machine that swallows up anything people drop in.
I'm thinking of an automatic(effective) and unconscious machine (or any object) that takes in any piece of information without comprehensive research, understanding, or evaluation of the information. I want to use a metaphor, comparing myself to this machine/object, as I was trained to be a professional test taker but a passive learner under the test-oriented education system. Previously, I was thinking of a flip-flopper (indecisiveness) or a dustbin (test-oriented in a way is positive), but neither were fit.
I appreciate your giving of creativity:)