Use 'drink in' when describing the act of cherishing or fully immersing yourself in a moment. Visiting the Grand Canyon, she drank in the vastness surrounding her.
Pro Tip 2/3
Metaphorical Sense
'Drink in' is often used metaphorically to mean absorbing surroundings, not actual drinking. They arrived at the overlook and drank in the magnificent skyline.
Pro Tip 3/3
Emotive Experience
The phrase expresses an emotional response to something beautiful or impressive. She drank in the melodious tunes of the orchestra, feeling each note.