unstopper

verb

1. (transitive)To remove the stopper from.

   “He unstoppered the little flask and took a few swigs.”

   “In vials of ivory and coloured glass / Unstoppered, lurked her strange synthetic perfumes, / Unguent, powdered, or liquid— […]”

   “That night the whisky was unstoppered and Bradly lolled in bed, smoking, and betimes sweeping out an arm of conquest for his nobbler and taking a lordly pull at it.”