The main answer is: Rather than an orb, Shadwell is given a bottle of strong drink during his coronation.
In lines 118-138 of "Mac Flecknoe" by John Dryden, Shadwell, who is portrayed as the dull and unworthy successor to the poetic throne, is humorously presented with a bottle of strong drink instead of the traditional orb during his mock coronation.
In the context of a royal coronation, the orb is a symbol of the monarch's power and authority. But by substituting the orb with a bottle of strong drink, Dryden satirizes Shadwell's lack of poetic prowess and intellectual depth.
The choice of booze as a symbol implies that Shadwell's reign is characterized by indulgence and mediocrity, contrasting sharply with the dignified and meaningful symbolism associated with a traditional coronation