The wine glasses you speak of and covet are Reidel wine glasses. YES, it is a THING! I had the pleasure of working in a wonderful Italian restaurant and our owner treated us to a wine tasting seminar where we learned about the difference in "lipped" or Libby type wine glasses versus "non-lipped" Reidel wine glasses. And yes, there is a major difference!
We were actually hunted down by the Vines guy because we wanted to take our wine to the dining room! Seriously, we were not stealing them... I have my own at home but there was NO WAY in you know what, that he would allow it.
We are even willing to put a deposit on them in our shipboard account..... But no.
Luggage does not really allow a place for decent wine glasses.
Do you realize what a fortune that Princess could make by selling Princess logo Reidel wine glasses on board??????? Truly, this is a no brainer.