Glass and the Metal Glass Holder are Dishwasher Safe Glass is slightly tapered from top to bottom Suitable for Hot or Cold Beverages Russian Cut Crystal Tea Glass + 1 Metal glass Holder Podstakannik Traditional Russian Tea Glass Holder "podstakannik",meaning under and "stakan" glass. It has been traditionally used during travel in railroad cars for tea drinking so as not to hold the hot glass with your bare hands. It has become a statuses symbol. make from materials which doesn't rust or stain and is dishwasher safe