Because it requires fresh sap, and the maguey's growing range is limited, pulque remains a proudly local product, made only in Mexico City and nearby states.
神话百科 The Mythology Book (Big Ideas Simply Explained)
In contrast, Nana Huatzin used the thorns of their maguey plant to draw out his blood, and because he could not afford incense, he burned scabs from his own body.
Pulque-makers carve out the heart of a mature maguey plant (ie, one around 12 years old) and collect the sap, known as aguamiel, or " honey water" , for its ultra-sweet taste.