This vintage set of 4 Corelle Corning Ware "FIRST OF SPRING" tea cups or coffee mugs features a charming design in off-white and blue, perfect for all occasions, especially spring. Made in the 1970s in the USA, these round mugs have a mid-century modern style with a glossy finish. They are microwave and dishwasher safe, making them a convenient and stylish addition to any home kitchen. The pressed glass production technique and fused glass design give these mugs a unique and collectible quality for those who appreciate vintage pieces.