This vintage cobalt blue heavy glass coffee/tea mug/cup is a unique and charming piece from the 1970s, made in the USA by Libbey. With a classic round shape and a medium size capacity of 8oz, this mug is perfect for enjoying hot or cold beverages on any occasion. The deep blue color and solid pattern make it a stylish addition to any kitchen or collectibles collection. This original and collectible piece is a great find for those who appreciate vintage decor and quality craftsmanship.