this is a vintage smoked glass fluted ramekin (often used for soufflés, crème brûlée, or individual starters). Judging by the stack shown, you have a set of at least four or five nested together. Looking closely at the faint lettering embossed on the inside left wall of the top dish, these appear to be vintage Duralex (made in France) or Pyrex tempered glass ramekins from around the 1970s or 1980s, featuring a classic retro "smoky" or "amber-tinted" hue that was incredibly popular during that era
