You are what you eat, and potions are what they say

Potions of invisibility are invisible.

Potions of flying needs to be kept on a leash.

Potions of diminution are really tiny.

Potions of giant strength are REALLY hard to open, dammit!

Potions of invulnerability are impossible to break.

Potions of polymorph (self) looks like a hippopotamus.

My daughter illustrated some potions!