Source : Webster's Revised Unabridged Dictionary (1913)

Stopper \Stop"per\, v. t. [imp. & p. p. {Stoppered}; p. pr. &
   vb. n. {Stoppering}.]
   To close or secure with a stopper.

Source : WordNet®

stoppered
     adj : (of a container) having a stopper in the opening; "the
           tightly stoppered bottles"