An Oak Segmented Vessel from the Gate Post series. Approximately, it stands 21cm tall. Across the top it measures 2.5cm in diameter (opening 1.3cm) and the widest part measures 11cm. The base is 5cm in diameter.
You can see it being made here on my YouTube channel:
https://www.youtube.com/watch?v=S0gypTx_ig0&t=21s
 
The pieces I make are decorative/ornamental and are not waterproof or food safe.
 
Disclaimer:
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.