One of Bottle Logic Brewing’s most sought-after beers is seeing its fourth release this weekend.

That creation is Fundamental Observation, a 13.2 percent ABV “imperial vanilla stout” that has aged in a combination of barrels that previously held Buffalo Trace, Four Roses, Heaven Hill and W.L. Weller bourbon. According to the Anaheim, Calif.-based brewery, each individual barrel had multiple additions of Madagascar vanilla beans over the course of a year.

Fundamental Observation 2018 is a member of Bottle Logic’s Stasis Project Series, which “celebrates the barrel as a fifth ingredient” and includes other notables such as Space Trace 2018 (13.6 percent ABV), Ground State 2018 (12.89 percent ABV) and The Lost Colony 2018 (12.5 percent ABV.)

According to Bottle Logic, the newest batch of Fundamental Observation will be packaged in 500ml bottles ($23.95) and will have a four bottle per person purchase limit. Interested parties will have the chance to order tickets redeemable for bottles on Aug. 5 via Eventbrite and bottle pickups will start Aug. 11 with no proxies will be allowed.