From this hopper jam I'm really excited. Through the narrow neck to fit on a variety of glasses. Even for Weckflaschen that really have only a narrow opening, it is suitable. Comfortable slip the jam into glass without soiling the edge. For permanent preservation, this is of great value, since soiled screw grooves can mold so that the Einmachgut is lost. By the shape, it is possible to determine the end of the filling level. If the narrow neck filled to the top, without yet reaching the leaking basin of the funnel, so also the jam jar is full. That is, jam briefly filled up to the upper end of the narrow neck, one knows that the Aufnahmekapazitätdes marmalade jar is reached. The disadvantage of other funnel in which must be estimated, when the glass is full and where ultimately the glass is contacted with a "pop" to overflow through the rest of the funnel is not given here. Highly recommended!