Officers at a San Francisco Bay Area jail confiscated an enormous stash of homebrew alcohol concocted by prisoners for a Super Bowl blowout party, sheriff’s officials told Don Sweeney of The Sacramento Bee.

“There will be no super bowl party at Santa Rita Jail tomorrow,” the Alameda County Sheriff’s Department wrote on an Instagram post Saturday showing officers posing with trash bags of green-, yellow-, blue- and orange-colored alcohol.

The concoction, called pruno, is commonly produced in prisons and jails by fermenting “fruit, sugar, water, and other common ingredients for several days in a sealed plastic bag,” reports the Centers for Disease Control and Prevention.

But it’s also a recipe for botulism, particularly since the process isn’t exactly sanitary, the CDC warns.