| 摘要 |
A coaster device includes a substrate including a brightening agent on its upper surface and a photoluminescent layer on, or impregnated into, the upper surface. The photoluminescent layer on said upper surface absorbs radiant energy and emits radiant energy in the form of light. The substrate is optionally formed from a moisture absorbent material, a moisture resistant material, or a combination thereof. Optionally, a case may be provided to receive and at least partially encase the substrate.
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