A wafer half-shell is described which has a mouth delimited by at least one annular surface and one or more side walls, in which the mouth surface and the surfaces of the side wall have a substantially smooth surface finish. Preferably the outer surface of the side wall has a porous, continuous or discontinuous region which extends peripherally and is receded relative to the mouth surface of the half-shell, resulting from the cutting of a radial wall connected to the side wall of the half-shell in a receded position relative to the annular surface defining the mouth of the half-shell. The annular coupling surfaces of the complementary half-shells have preferably centering means which are complementary each other. The half-shell is useful particularly for the production of a food product comprising a pair of half-shells fitted together mouth to mouth and including a mass of liquid filling.