Henry Wilkinson Ltd, Sheffield, silver plate, glass and leather hip flask with detatchable base for cup, made between 1872 and 1892.  Experts maybe able to date exactly from the mark.

 The flask weighs 250 grams and has a capacity of 1/3 gill liquid.  It measures 13cm tall including lid and base and is 8cm wide.

 Inside the screw collar of the lid, the glass appears discoloured.  Putting a finger inside the top of the flask I cannot feel any chips so I figure it must be between the outside of the glass and the screw collar.  I have tried to show this in a couple of pictures.