The Knot Goblet is made from a piece of Burr Elm with touches of resin and has a knot carved into the stem.
Approximately, it stands 23.5cm high at the tallest point, the cup diameter is 6cm and the base is 6.5cm.
You can see it being made here on my YouTube channel:
The pieces I make are decorative/ornamental and are not waterproof or food safe.
Wood is a natural product - I cannot guarantee that there won't be further movement over time or depending on the environment it is in, to me this can enhance the piece, but I understand not everybody will like this.