Abstract: A grinding unit having a ring burr and a frustoconical burr that together delimit a grinding gap therebetween. A first angle between a first subset of curved teeth of the frustoconical burr and the first curved teeth of the ring burr provides a grinding gap having an angle smaller than a second angle between a second subset of curved teeth of the frustoconical burr and the first curved teeth of the ring burr. A geometrical outline taken through the cusps of the second curved teeth at the top end face of the frustoconical burr opposite the base is a square or rectangle. This grinding unit produces a ground product, such as ground coffee beans, with fewer turns than known grinding units and with less effort. The properties and qualities of the resulting ground products are superior to those obtained with conventional grinding units because flavor and aroma are retained.

Abstract: A pouring insert is provided for insertion into a container outlet, for example a bottleneck, for aerating liquids pored from the container. This is achieved by a combination of a hollow, tapering jacket with a hollow pipe axially disposed within it. The jacket features a plurality of elongated slots penetrating the jacket and allowing for liquid/air flow therethrough. The invention furthermore relates to a bottle pourer having a spout and the pouring insert described herein. The invention also relates to the use of the pouring insert and of the bottle pourer for aerating wine. Finally, the present invention relates to a method of manufacturing the pouring insert by injection molding.