The water can in the larynx (saccules) are present in:
It is a diveiculum of mucous membrane which stas from the anterior pa of laryngeal ventricle extending between the vestibular folds and lamina of thyroid cailage. The saccule has plenty of mucous glands whose main purpose is to lubricate the vocal cords (vocal cord is devoid of mucous glands) and hence is known as water can of larynx.
Paraglottic space
Pyriform fossa
Reinke's space
Laryngeal ventricles