An important part of the Egyptian funeral was a ritual known as the "Opening of the Mouth", which was meant to animate the spirit of the deceased. This model cup was part of the set of magical implements used in the ceremony.
From Giza G 2381 A (tomb of Impy). 1912: excavated by the Harvard University–Boston Museum of Fine Arts Expedition; assigned to the MFA in the division of finds by the government of Egypt. (Accession date: December 4, 1913)
Harvard University—Boston Museum of Fine Arts Expedition