Although not designed for food service this bowl is “Food Safe”. To clean just wipe the bowl out with soap and water but do not submerge the bowl, it is not dishwasher safe. A yearly wipe down with "Mineral Oil" is recommended and can be done more often if needed.
If the bowl is not intended for food consumption, then simply treat it just as any other wooden furniture. The use of furniture polish is recommended periodically to retain the shine. Please remember that sunlight will affect the color of the wood and it is recommended that the bowl be rotated on a consistent basis to allow the color to age in a uniform basis.