Durable Set of 4 Ceramic Coffee Mugs in Pressed Metal Base, 4-piece Coffee & Tea Cups Set

As far as the cups and the holder, this seems to be a quality set. However, due to the design of the cups (the bottom is concave with a thin ridge on the bottom of the cylinder), the heat built up on the bottom ring of the cup and left a heat ring on our coffee table which we can't remove. On our granite counter tops, it leaves a heat ring that dissipates after a few minutes. Would give 5 stars if not for the heat ring issue.