Abstract: The containers have a length greater than the width and have a front wall, a rear wall, and connecting sidewalls. The container is closed at the bottom by a bottom wall and has a dispensing channel at a top end. Between the front wall and sidewalls and rear wall and sidewalls, there are concave transition walls. The concave transition walls extend at least half the distance from the bottom wall to the dispensing channel. The container has a handle formed by an aperture in the front wall extending to the rear wall, an aperture wall connecting the front wall and rear wall. At least partially surrounding the aperture there is an aperture concave transition wall. The concave transition walls provide increased longitudinal and lateral strength to the container. The bottom wall preferably has one or more concave recesses. These will be laterally and longitudinally in the base surface.