DescriptionThis is a set of coasters for water absorption and heat insulation. Easy to clean and maintain, just dry them in shade after washing. The water droplets can be inhaled and dried naturally in about 15 seconds.They have the ability to naturally release absorbed water, making them highly dry items. They contain countless pores with a diameter of 0.1 to 1 um, which can quickly absorb water.Features-Material: Diatom mud. -Size: About 29.50X19.50X1.00cm / 11.59X7.66X0.39inch. -This is a set of coasters for water absorption and heat insulation. -Easy to clean and maintain, just dry them in shade after washing. -The water droplets can be inhaled and dried naturally in about 15 seconds.-They have the ability to naturally release absorbed water, making them highly dry items.-They contain countless pores with a diameter of 0.1 to 1 um, which can quickly absorb water.