They’re gonna party like it’s 399.

Researchers in China discovered the ultimate “aged” brew after happening upon a vessel containing nearly a gallon of still-liquid beer that dated back some 2,200 years, per a study in the Journal of Archaeological Science.

“What surprised us even more was the very large volume and the exceptional state of preservation,” Ruru Chen, a researcher at Northwest University’s School of Cultural Heritage in Xi’an, China, told Fox News Digital.

The researchers had been excavating the Shanjiabao cemetery in the Ningxia Hui Autonomous Region, whereupon they discovered 183 tombs dating back to the Warring States Period…

Read the full article at NYPOST.COM