Importance

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Abstract

A cup assembly with air insulation comprised of two regular paper cups one inside the other. Each cup has a truncated conical side wall with an outwardly rolled rim defining an opening at the larger end and a bottom wall at the smaller end. The inner cup is inserted from bottom side into the outer cup. The rolled rim of the inner cup pushes against the inside of the outer cup, and the bottom of the inner cup touches the bottom wall of the outer cup. The rolled rim of the inner cup maintains an air space between the side walls of the two cups. The contacts at the bottom and top provide support for the inner cup and maintain it in axial alignment with the outer cup. The contact pressure between the rim of the inner cup and the side wall of the outer cup essentially seals the air space for a more efficient thermal insulation and prevention of beverage leakage into the air space and also provides a frictional force that keeps the inner cup and the outer cup together. In a similar embodiment, the outer cup has an inwardly rolled rim which pushes against the outside of the inner cup.

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First Claim