A more thorough explanation:

Definition: A botiler of the king was an officer who was responsible for providing the king's wines. The word "butler" is derived from botiler.

By virtue of office, the botiler had the privilege of choosing two casks from every wine-laden ship. This meant that the botiler had the authority to select the best wines for the king.

Example: During medieval times, the botiler of the king was an important position in the royal household. The botiler was responsible for ensuring that the king had access to the finest wines from around the world. For example, if a ship arrived in port with a cargo of wine, the botiler would be able to choose two casks from that shipment to be sent to the king.

Explanation: This example illustrates how the botiler of the king had the authority to select the best wines for the king. The botiler's position was highly valued because the king's wine was an important part of royal life. The botiler's role was to ensure that the king always had access to the best wines available.