The present invention is directed to a beer having reduced quantities of AcHFA. It has been found that beer with reduced AcHFA quantities has improved foam stability. The invention provides beer with reduced AcHFA quantities, as well as methods for removing AcHFA from beer during or after fermentation, or for removing a precursor for AcHFA from wort.

The present invention is directed to a beer having reduced quantities of AcHFA. It has been found that beer with reduced AcHFA quantities has improved foam stability. The invention provides beer with reduced AcHFA quantities, as well as methods for removing AcHFA from beer during or after fermentation, or for removing a precursor for AcHFA from wort.

In one aspect, a vessel is provided for use in processes associated with a liquid solution of fermentable sugars, the vessel having opposing first and second ends. The vessel further including: a first tube having one or more holed side walls; a second tube having at least one holed side wall, wherein the first tube is located inside the second tube; and a container, wherein the first tube is connected to the container at an open end thereof via a first end piece, and wherein the second tube is located inside and connected to the container. Liquid can flow through the one or more holed side walls of the first tube and the at least one holed side walls of the second tube, thereby allowing the liquid to continuously flow through the volume defined by the first and second tubes. Control of temperature and pH inside the volume is improved.