Easy... you better give me good rating tho, I spent five hours looken for your answer.
Answer:
The mirror
Step-by-step explanation:
In the book Liza starts to complain to Higgins about the looking-glass (women's mirror). Here is the fragment from the Pygmalion:
HIGGINS. I’m glad the bath-room met with your approval.
LIZA. It didn’t: not all of it; and I don’t care who hears me say it. Mrs. Pearce knows.
HIGGINS. What was wrong, Mrs. Pearce?
MRS. PEARCE [blandly] Oh, nothing, sir. It doesn’t matter.
LIZA. I had a good mind to break it. I didn’t know whichway to look. But I hung a towel over it, I did.
HIGGINS. Over what?
MRS. PEARCE. Over the looking-glass, sir.