A small umbrella which may be removably attached to a beverage container in order to shade the beverage container from the direct rays of the sun.
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| Number | Title | Issue Date |
| 4271354 | Manual belt electro-optical control An electro-optical control comprising a housing, a source of light, a photocell, and an endless belt having a substantially planar run manually movable with a finger. The belt has portions of differing light penetrability. Members on the housing guide the... | 06/02/1981 |