Hand-sculpted white resin circular coaster. Set of 4 white. Care Instructions Resin can sometimes become frosty after washing. If this occurs, simply rub a tiny drop of vegetable oil onto the surface with a soft cloth to restore its luster. The frosty appearance can also be left alone as this can be preferred. It does not affect the quality and usage of the item. Avoid use of sharp objects or knives on the resin surface. Although resin is shatter resistant, it can break if dropped on the ground. Dishwasher safe. Not for use in the microwave or with high heat.