A container having a base and a sidewall portion extending upwardly therefrom is characterized by striations in the sidewall which define removable strips of the sidewall portion. A shoulder adjacent the opening of the container improves handling of the container, prevents or restricts undesired rotation of the container, restricts or preventing the flow of gas or liquid or solid from above the shoulder means to below the shoulder or vice versa, and stabilizes the containers when, for example, a plurality of them is arranged appropriately. A method of use of such containers is disclosed, including the steps of providing a plurality of such containers and arranging them appropriately.

A quadrilateral refuse container (2) comprising a bottom (8) and four sidewalls (6) extending upwardly therefrom and terminating in an upper rim (64). The container further comprises a handle (52) extending outward from at least one side of the container, the handle having two parallel spaced apart sideplates (54), each sideplate having a lower edge profile for defining a downwardly concave recess (62). When one container is stacked inside a like-configured second container, the upper rim of the bottom container is nested within the handle sideplate recesses of the top container, and the sidewalls of the underlying container are held in a fixed vertical orientation. Recesses (49) are further provided within sidewalls (6) of the container, adapted to receive handle projections from a like configured second container, whereby the containers can be stored in a side by side abutment.

The present invention relates to a cooking utensil having a double-layered structure which preserves heat efficiently as well as provides even heat distribution and to a method of fabricating such cooking utensil. The cooking utensil has a heat conduction medium charged between outer and inner shells forming a double-layered structure which is sealed by a curling machine without the use of a built-in safety valve in the wall of the cooking utensil. The method comprises the steps of placing upright the outer shell on a concaved mold, the outer shell having a flange, placing a predetermined amount of the heat conductive medium into a space defined by the outer shell placed on the first mold, placing upright the inner shell in the outer shell so that the heat conductive medium at least partially surrounds the inner shell, forming a rolled joint by curling the flanges of the outer and inner shells together a predetermined number of times to prevent the heat conductive medium from being discharging from the space even when the cooking utensil is exposed to heat. The curling of the flanges of the outer and inner shells is carried out by placing at least one curling roller against the flanges while rotating the outer and inner shells with respect to the curling roller.

A cooking container has an outer shell, an inner shell disposed inside the outer shell forming a cylindrical wall space between the outer and inner shells. The wall space is formed between the outer and inner shells stantially along the height of the inner shell by curling the flanges of the inner and the outer shells at least four times. The cooking container also has a first heat conductive plate being in contact with an inner bottom surface of the outer shell and an outer bottom surface of the inner shell to allow even distribution of heat through out the bottom surface of the inner shell. A'second heat conduction plate is affixed to and in contact with an outer bottom surface of the outer shell. The wall space between the outer and inner shells contains ambient air.