Every wooden table carries the ghosts of cold glasses — pale rings that never quite polish out. Strata™ stops the next one before it forms. Each coaster is a slab of natural travertine, the same pitted limestone Romans built with, cut thick and honed smooth. The stone is naturally porous: condensation wicks into the surface instead of pooling under the glass, so nothing sweats onto the table and the coaster never suction-cups to the bottom of your cup. Set out as a stack of four, they read as sculpture; in use, they're the quietest insurance your table has ever had.

Wipe with a damp cloth and let air dry. Avoid soaking, harsh cleaners and acids (citrus, vinegar) — travertine is natural limestone. A drop of stone sealer once a year keeps it stain-shy.

Natural cream travertine, honed finish with the stone's original pores left open — that's what lets it absorb condensation. Cork-dot feet protect the table beneath. Each piece carries its own fossil-flecked grain.