Fixture above a bathroom sink

MEDICINE CABINET

["Think of where you might store bandages or toothpaste—it’s often mounted on the wall and has a mirror on the front."]

This clue points to a common bathroom storage unit mounted on the wall above the sink. A "medicine cabinet" is exactly that—a small cabinet, often with a mirror, where people keep toiletries, medications, or first-aid supplies. The term is straightforward, with no wordplay or hidden meanings, since it directly describes the fixture’s location and purpose. You’d recognize it as the boxy compartment that swings open when you’re reaching for aspirin or toothpaste.