• This set of 4 vintage green Vaseline glass coasters, each measuring 3.75 inches in diameter, is a charming addition to any drinkware collection. Manufactured in the early 20th century, these round coasters feature a decorative design that is typical of the Vaseline glass production style from that era. The unmarked brand and original manufacture make these coasters a unique and authentic piece of history to add to your barware collection.