Self righting drinking cup with twist on base

Receptacles – End wall structure – With weight or counterweight

Patent

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Details

215100A, 220630, 220711, 220771, 220772, A47G 1922

Patent

active

052940187

ABSTRACT:
According to the invention there is drinking cup having a flat bottom and two large diametrically opposed handles. A removable lid with a drinking spout and an air vent is provided to prevent spillage. A separate weighted convex base is attached to the base of the cup to automatically right the cup under the force of gravity. The bottom of the cup and the top of the base are provided with a circular groove and a mating circular ridge. The ridge and the groove positively engaged to align the base horizontally in place on the bottom of the cup while permitting rotation of the base relative to the cup. Two diametrically opposed generally C-shaped clips are located on the edge of the base and extend upwards from the edge of the base and face in opposite directions in order to engaged the handles on the cup upon rotation of the base.

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patent: 4953737 (1990-09-01), Meyers

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