Tired of going to the trouble of making your own bacon milkshakes at home? You're in luck -- as long as you don't live in the Northeast or Midwest. Eater reports that Jack in the Box, which has 2100 locations in 19 states, is adding a bacon milkshake to its menu for as part of its new "Marry Bacon" ad campaign.

The ad for the Jack in the Box bacon milkshake includes the important disclaimer that the beverage's stay on the menu will be "as limited as limited can be," and encourages would-be shake drinkers to act fast.

A Jack In The Box spokesperson told the Huffington Post, "The shake is not listed on our menus in the restaurants, so it’s more of a 'secret item' that people can order. Each restaurant is getting a very limited quantity, so we don’t know how long they will last."

After looking into the nutritional information on the bacon milkshake, we can't help but feeling relieved it won't be around forever. According to the Jack in the Box website, which lists the bacon shake as a beverage rather than a dessert, a "regular" 16 oz bacon shake weighs in at 773 calories and 40 grams and fat. A 24 oz large, meanwhile, add a whopping 1081 calories and 54 grams of fat to your meal.

We couldn't find any other examples of major chains serving bacon milkshakes in the past. But Denny's has been serving a bacon sundae since April, so Jack in the Box isn't the first chain to hop on the bacon dessert bandwagon.

UPDATE: Since we first posted this article, the Jack in the Box bacon milkshake has taken the internet -- if not America's stomachs -- by storm. More details have emerged. Chief among them is the revelation that the bacon milkshake contains no real bacon. Instead, it gets its porkiness from something called "bacon-flavored syrup." So the bacon milkshake might even be kosher! But some combination of the droves of Orthodox Jewish milkshake-lovers, the difficulty of manufacturing bacon syrup and the inexhaustible culinary curiosity of the American populace has already led many outposts of Jack in the Box to run out of bacon syrup -- leaving some would-be bacon milkshake drinkers high and dry. But if you don't get your hands on a shake before they're gone, don't fret too much: we hear the bacon milkshake doesn't even taste good.