Pumpkin juice

"What did you expect? ...Pumpkin juice!?"

— Madam Pomfrey after Harry Potter spat out the Skele-Gro.^[src]

Pumpkin juice was a beverage that was made from pumpkins. Manufactured since 1837 by London Pumpkins & Sons,^[1] it was extremely popular in the wizarding world, particularly among the students at Hogwarts School of Witchcraft and Wizardry. It was drunk at any occasion, such as breakfast, lunch, at feasts or on other occasions. It seemed to have taken on the same role that orange juice had in the Muggle world, though orange juice was sometimes consumed in the wizarding world as well.

Pumpkin juice was readily available, and could be purchased on the Hogwarts Express. Severus Snape threatened Harry in his fourth year that he might slip Veritaserum in his evening pumpkin juice while he believed that Harry had stolen his potion ingredients from his store cupboard in his office. Dolores Umbridge offered Harry Potter pumpkin juice in 1996 when she wanted to secretly administer Veritaserum to him, but he chose tea instead. Prior to a Quidditch match in his sixth year, Ron Weasley believed that Harry had slipped Felix Felicis into his morning pumpkin juice to help him play perfectly.