Abstract: An injection molded closure is provided for containers that can hold cold products or the like, such as dairy products. The closure is made with a thin wall construction of 0.020 inch or less to provide a lightweight, inexpensive closure. The preferred closure is made of polypropylene with flared skirt walls that are not toed-in. The closures are supported in the stack by radially inner and outer stacking surfaces. The skirt walls are spaced slightly apart, when the closures are stacked, for example, with a 0.002 inch air gap between the skirt walls when perfectly centered with the skirt walls aiding in self-centering of the closures within the stack. An air vent may be provided to allow escape of air between nested, adjacent closures.