Can we drop "more" in the usage of "couldn't agree with * more" to show we "agree"?

[sula54]

As many people know that when we say "I couldn't agree with you more" means "I absolutely agree with you.", one of my friends used it like this:

A: The coffee is quite good, isn't it?
B: Yes, I couldn't agree with you.

I know at that time he wanted to say "I couldn't agree with you more." but without "more" it sounds a disagreement in the past and all the examples I know in this kind of usages "couldn't" will always put with a comparative, such as "Couldn't be better", "Couldn't be worse"....

Can the "more" be droped out?

[Tdol]

No; it doesn't make sense to me without 'more'.

[Temico]

tdol,

"I couldn't agree with you more" means "I agree with you wholeheartedly"
"I couldn't agree with you less" means " I don't agree with you at all", right?

What about, "I couldn't agree with you any more"? What does it mean?
Also, what does, "I couldn't agree with you any less" mean?