Patent ID: 7677435

Claim:
A double-walled stackable and de-stackable paperboard cup comprising an inner cup and an outer sleeve, with a gap between the inner cup and the outer sleeve, said outer sleeve being attached below a drinking lip of the inner cup and comprising a rolled lip applied to the lower end of the outer sleeve and disposed on an outer surface of the inner cup, wherein a continuous shoulder-shaped stacking stopper is provided on the outer sleeve and is configured to engage the complete circumference of the drinking lip of an adjacent stacked cup and wherein between an upper edge of the outer sleeve and the shoulder-shaped stacking stopper a first cylindrical or conical area in which the outer sleeve at least partly abuts the inner sleeve and a second conical area of the outer sleeve are arranged, said second conical area having an opposite conicity relative to a conicity of the outer sleeve between the shoulder-shaped stacking stopper and the rolled lip applied to the lower end of the outer sleeve.