| 摘要 |
A beverage coaster has a base and a tab disposed to the base. In a descended position, the tab occupies an aperture in the base. In an upright position, the tab is angularly positioned in relation to base of the beverage coaster so as to display an indicia. The indicia can communicate information relating to the condition of the patron, a request of the patron, or a condition of the beverage thereon.
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