To determine whether to use a colon or a semicolon in the given sentence, let's break it down:
1. A colon (:) is used to introduce a list, explanation, or clarification.
2. A semicolon (;) is used to connect two closely related independent clauses.
In the sentence provided, "Every morning I have a giant glass of my favorite juice," there is no need to introduce a list, explanation, or clarification. Instead, it seems like there are two independent clauses: "Every morning I have a giant glass" and "of my favorite juice." These two parts are closely related and can be connected using a semicolon.
Therefore, the correct answer is: drink;