An early Classic ( 460-480 AD ) period Mayan tomb from the site of Rio Azul , Guatemala , had vessels with the Maya glyph for cacao on them with residue of a chocolate drink .
It was used there around 1100 BC\/BCE An early Classic Period ( 460-480 AD\/CE ) Mayan grave from Río Azul , Guatemala , had cups with the Mayan words for cacao on them with traces of an old chocolate drink .