I have owned the coffee cups in the zwilling collection for a long time and they are used often. Since I gave them to my adult children as gifts, they sometimes secretly "borrow" one or two when the have guests or as their to go when visiting! I plan to get them each a few more but in the meantime, I purchased 2 of these sets. They are bigger and easier to claim as mine when I find extras at their houses. Its a running joke around here, who can get the most of moms glass mugs, this trick should slow down the game a bit!