Add a rare and unique piece to your mug collection with this vintage Xanax advertising pharmaceutical rep promo coffee mug. The mug features a heat-changing design that will surprise anyone who sees it. With a brand name of Upjohn Pharmaceutical, this mug is a perfect addition for collectors of advertising-themed items. The multicolor design of the mug is perfect for any kitchen and makes for an excellent conversation starter. This coffee mug is not only a functional item for coffee or tea drinkers, but also a great collectible item for those who appreciate the pharmaceutical industry. Heat Change effect is not active, as it is faded, but this is the rare style that collectors are searching for!