The upside down is how eleven described an alternate dimension to the boys this is the place where will byers is trapped by the evil monster in stranger things a netflix original show this is not official merchandise it is an original design inspired by stranger things and should not be associated with official products ltbr gtltbr gtmug design reads the upside downltbr gtltbr gtour ceramic mugs are all white barring the printed design and are a standard mug size