I bought a new mug when I was at Vero earlier this year because I prefer the ceramic mugs. We have a million mugs at home, so I didn't really want to buy another one. (But, as it turned out it has become my new favorite mug.

)
After reading that you
could request ceramic mugs from housekeeping on this discussion board I decided to give it a try.
In Sep at VGC--I requested 2 ceramic mugs from housekeeping and received them.
In Oct at BLT--I requested 2 ceramic mugs from housekeeping and received them.
In Oct at BWV, housekeeping brought me another coffee maker. I think there was a little language barrier which was solved when I showed the housekeeping person a picture of the ceramic mug I was hoping to get. She returned with the 2 ceramic mugs I requested.
In Nov at BWV--I again requested 2 ceramic coffee mugs and housekeeping brought a bag filled with Styrofoam coffee cups. When I explained what I was looking for, the housekeeping person returned with the 2 ceramic mugs.
***edited to add: the person who brings the item that is requested is not the same person who you talk to on the phone when you initially make the request, so I think that adds to the confusion.
In Dec at VGC-- they said they didn't have any ceramic mugs available, but they could bring me some extra Styrofoam cups. I didn't push it and just used the Styrofoam cups.
As noted by others, they only had 4 Styrofoam cups to start. And, they did not replenish the supply during trash and towel day.