Representing a ringstand for holding pots and jars. The Old Kingdom version most frequently had a flat bottom and top:
(𓎽). The curved form developed later, with rare examples first surfacing during the 6th Dynasty. The body of the glyph was conventionally colored red; the triangle in the center was conventionally white. The reason for its phonogrammatic value of g is unknown.
Gardiner, Alan (1957) Egyptian Grammar: Being an Introduction to the Study of Hieroglyphs, third edition, Oxford: Griffith Institute, →ISBN, page 529
Henry George Fischer (1988) Ancient Egyptian Calligraphy: A Beginner’s Guide to Writing Hieroglyphs, New York: Metropolitan Museum of Art, →ISBN, page 14
Peust, Carsten (1999) Egyptian Phonology: An Introduction to the Phonology of a Dead Language[1], Göttingen: Peust und Gutschmidt Verlag GbR, page 48