A wine you could not tell apart from sunlight, if you held it up against the sun.
It glows from the cup as if a Yemeni ruby were set within the star Suhail.
Explanation: Suhail (Canopus) is a bright star traditionally linked with Yemen, and Yemeni carnelian (aqiq) was prized for its red glow; the image likens the wine's color and brilliance to both.