Teeth whitening concerns

I love coffee too much.

I drink two or three cups in the morning at the office and about two cups in the afternoon.

As a result, it seems that my teeth are gradually becoming stained.

Because it looks dirty, I also cover my mouth.

I looked into teeth whitening, and it seems that drinking coffee doesn't have a long-lasting effect.

Do you drink coffee and have similar concerns as mine?

I'm considering whitening, but I'm unsure.