This weekend, Jester King Brewery is releasing two brand new SPON variants, but these are sans carbonation.

Those beers are 2016 SPON Still and 2017 SPON Still, both of which are 5.4 percent ABV 100 percent spontaneously fermented ales that were boiled for four hours with aged hops before being cooled in the Austin-based brewery’s coolship. The ales were then fermented and aged in French Oak puncheons before being bottled.

However, unlike every other SPON release so far, 2016 SPON Still and 2017 SPON Still were bottled without the addition of any priming sugar, meaning that it will not feature any carbonation when it is poured.

“We selected one barrel from our 2014 brewing season and bottled it unblended in 2016 after about two and a half years in the barrel,” reads a post on Jester King’s Facebook page. “This beer is 2016 SPON Still. We also selected one barrel from our 2016 brewing season and bottled it unblended in 2017 after about one and a half years in the barrel. This beer is 2017 SPON Still.”

In November 2016, Jester King debuted its first 100 percent spontaneously fermented beer named 2016 SPON — Méthode Gueuze, a blend of one-, two- and three-year-old 100 percent spontaneously fermented beer that was made using the same traditional method that produces authentic Belgian gueuze. There have now been close to 10 variants to be released, announced or had labels filed so far in Jester King’s SPON Series, including 2016 SPON — Raspberry & Cherry2016 SPON — Peach & Apricot and 2017 SPON Blueberry & Pitaya.

According to a post on Jester King’s Facebook page, both 2016 SPON Still and 2017 SPON Still will be packaged in 750ml bottles ($30 and $25 respectively) and will each have a one bottle per person per day purchase limit when they go on sale on Sept. 29. In addition, only 455 bottles of 2016 SPON Still will be available, while 2017 SPON Still will have 489 bottles available.