Smooth designed miniature crystal Keepsake glass ~11x26mm bottle, metal screw plug, holds ~0.1 ml & comes on silver-plated ~18” chain.  See  for more information.  
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There may be other photos showing different angles, uses or styles of these type of keepsakes and are for your reference only.  We have sterling silver chains, or longer silver-plated chains, available in other listings.    Photos are enlarged to show detail.  
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PLEASE PAY ATTENTION to the measurements - a quarter equals 25mm.  There are plenty of FREE on-line measurement converters should you require.