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Duke Coasters Thirstystone
The ultimate college coaster. Cut from the most absorbent sandstone in the western United States, the Thirstystone Duke coasters are completely natural. They will absorb 45% of their own weight in water before saturation and will dry in 30 to 40 minutes. The Duke coasters are stain resistant and will not warp or lose ability to absorb moisture. Packaged in sets of 4.