Patent ID: 8206656

Claim:
A liquid dispenser comprising: an exterior surface; and an interior surface enclosing a volume that tapers outwardly in a downward direction so that any horizontal cross-section of the volume fits inside each horizontal cross-section below it from a full to an empty level of the dispenser, the interior surface including a projection oriented opposite the exterior surface, toward the center of the dispenser, and configured to limit a motion of solids within the dispenser, where the horizontal cross-sections of the volume include the projection, and any horizontal cross-section of the volume, including the projection, fits inside each horizontal cross-section of the volume, including the projection, below it, from the full to the empty level of the dispenser, and the projection tapers downwardly such that the projection becomes thinner along the downward direction from the full to the empty level of the dispenser, and the projection tapers inwardly becoming thinner along an inward direction from the interior surface to an inner edge of the projection which is oriented toward the center of the dispenser, and the projection becomes longer as measured from the interior surface to the inner edge in the downward direction from the full to the empty level of the dispenser.