sipping
v.v. drinking something very slowly by taking only a tiny amount into your mouth at one time.
v. drinking a liquid in small quantities or mouthfuls. The present participle of 'sip', often used to describe a relaxed or careful manner of consumption.
She is sipping her hot tea by the window.
We spent the entire afternoon sitting on the porch, sipping cold lemonade and watching the cars go by.
While the rest of the guests finished their drinks quickly, he remained in the corner, slowly sipping his vintage wine to appreciate its complex flavors.
The verb is transitive or intransitive; it can take a direct object or stand alone.
She is sipping of her coffeeShe is sipping her coffeeSip is a transitive verb and does not require the preposition 'of' before the object.