yacametztli (Mdz71r)
This iconographic symbol taken from a bowl of pulque (octli) helps identify the contents of the bowl as such. It is a yacametztli, or a nose ornament (nariguera, in Spanish). It is black, horizontal, and curling, somewhat reminiscent of a ram's horns.
Stephanie Wood
One can see the same symbol on a pre-contact pot that once held octli (pulque) in a blog from the University of Leicester. Multiple examples also appear in the Codex Mendoza on folio 71 recto, where we see people consuming pulque. The yacametztli also appears in the Codex Tudela and the Codex Magliabecchiano, where the goddess Mayahuel wears the ornament in her nose. These links come from a short article in Mexicolore, where Gael Olivier points to the association with pulque deities who wear the ornament and have this insignia on their shields. It may be that this is more than just an iconographic symbol but also a glyph.
Stephanie Wood
c. 1541, or by 1553 at the latest
crescents, moons, lunas crecientes, pulque, bowls, tazones, tazón
oc(tli), pulque, https://nahuatl.wired-humanities.org/content/octli
yacametz(tli), a crescent-shaped nose ornament, https://nahuatl.wired-humanities.org/content/octli
Codex Mendoza, folio 71 recto, hhttps://digital.bodleian.ox.ac.uk/objects/2fea788e-2aa2-4f08-b6d9-648c00..., image 152 of 188.
Original manuscript is held by the Bodleian Libraries, University of Oxford, MS. Arch. Selden. A. 1; used here with the UK Creative Commons, “Attribution-NonCommercial-ShareAlike 3.0 License” (CC-BY-NC-SA 3.0)