According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Stone Brewing Co. is working on Mission Warehouse Sour — Sauvignon Blanc, an 8.7 percent ABV sour ale brewed with sauvignon blanc wine grapes.

This would be the second addition to the Escondido, Calif.-based brewery’s Mission Warehouse Sour Series, after Mission Warehouse Sour – Apricot was released on Nov. 4.

As with the inaugural release, Mission Warehouse Sour — Sauvignon Blanc will be packaged in in four-packs of 330ml bottles ($32) and will be sold exclusively online, with pickups available at three Stone Company stores in Escondido, Liberty Station or Pasadena.

An email sent to the brewery for additional information was not immediately returned.