"Don't feel badly if you can't stomach it."
"I didn't say that!"
Bloodwine was a popular alcoholic beverage among the Klingons, best served warm. (DS9: "The Way of the Warrior") As with many Klingon foods and beverages, it was not for the faint of heart. Bloodwine was known to be highly intoxicating, to the point that most non-Klingons were scarcely capable of tolerating it; it was twice as potent as whiskey. (VOY: "The Killing Game, Part II") The first Human known to consume the beverage was Jonathan Archer, while he awaited the verdict of his trial on Narendra III. (ENT: "Judgment")
Klingon captains and generals were fond of carrying several barrels of their favorite vintages to celebrate victories. Martok and Worf considered the vintage of 2309 to be the finest. (DS9: "Treachery, Faith and the Great River", "Once More Unto the Breach", "When It Rains...", "What You Leave Behind") Worf liked his bloodwine very young and very sweet. (DS9: "Change of Heart") He programmed the Enterprise-D replicators with a close version of bloodwine. (TNG: "Gambit, Part II")
Bloodwine was used in a symbolic gesture following the Invasion of Cardassia in 2375. While standing on the surface of Cardassia, Martok offered William Ross and Benjamin Sisko bloodwine which had been previously promised for celebration of victory. However, at that moment, Ross and Sisko reflected on the destructive nature of war, and poured their glasses of bloodwine on the ground. (DS9: "What You Leave Behind")
While in later seasons, bloodwine was usually served from large kettles or smaller, silver bottles, in "The House of Quark" it was served from a glass bottle in the shape of grapes. The same type of bottle appeared in "Vortex" where it contained langour.
In 2012, Vinport produced a Klingon bloodwine made, unauthentically, from grapes.