I have seen a good number of these listed on ebay in the last year, like almost too many, which made me think they might be something rather recent, seeing items in large numbers all at the same time has that effect on me. They come in a number of different color combinations, with a stopper.
See if this bottle, which still has its paper label on it is anything like yours, if so, then you are likely missing your stopper. --- MikeLINK
Here is another, which also has a brand new looking label on it.LINK