marbco sandstone water absorbent hand crafted round coasters for drinks - 4 inches wide thirsty stone bar/ drink coasters- made from rainbow sandstone (set of 4 without holder) marbco the first thing we expect early in the morning is a perfect cup of coffee or tea and in evening after a hectic day we usually want to relax by having wine or beer or whisky or anything.and to place that cup or glass or bottle ,we need perfect coasters so that it does not make us want to clean the surface every time we want something to drink and hence the marbco sandstone coasters are just a perfect addition to your table. the speciality of these coasters are that they absorb the liquid (from the extra chilled glass of wine or beer bottle) on it and does not let it spread over the surface of your table or wherever it is placed.