Set of 6 slate Blue Corelli Ceramic Mugs

vintage Pyrex D-handle coffee mugs in the slate blue color. These mugs are made of milk glass and were produced by Corning in the United States. The mugs have a raised backstamp on the bottom that reads "PYREX," "MICROWAVE SAFE," "NO STOVETOP OR BROILERS," and "CORNING USA". They are approximately 3.5 inches tall and have a diameter of about 3.5 inches at the rim. They were crafted in 1982.