bottle of whiskey that a bar customer buys, writes his name on, keeps on a shelf at the bar, and drinks little by little on successive visits (lit: keep bottle) 意味

• bottle of whiskey that a bar customer buys, writes his name on, keeps on a shelf at the bar, and drinks little by little on successive visits (lit: keep bottle)
  キープボットル
  

• bottle of whiskey:    ウイスキー一瓶｛ひとびん｝
• great little bar:    こじんまりしたすてきなバー
• shelf bottle:    装置びん