The McDonald's Flintstones RocDonald Set of 3 Glass Mugs from the 90's are a unique collectible item featuring clear glass mugs with a fun Flintstones theme. This set of mugs was part of a promotional campaign by McDonald's in the 1990s, showcasing the popular fast-food restaurant branding. The mugs are an original piece of memorabilia that reflects the popular culture of the time, making them a sought-after item for collectors and fans of 90's nostalgia.