I have seen on some of Wendell’s videos that he has what it looks like as a glass cup that is small and I am thinking it is part of a oriental tea cup and kettle set. Have not watched wendell’s content in a long time so i am not sure if he even still drinks from it on his shows.
IIRC he got it with a glass teapot that was sent in once. I don’t have a link, but I’m pretty sure it’s on Amazon.
This was discussed before. He said what make it was and I believe gave a link. I dont have time to search.
Look in this thread.