Inspired by the rings of a circus, with tiered seats on the rim, the Harena collection brings the carnival spirit to your family table. The rings create a lively design that undercuts the austere look of the immaculately white or black opal. Opal glass is five to six times more resistant than normal glass and it withstands constant use so it will last longer and it is non-porous, cleaner, more hygienic glass.