Large vintage lucky six pence hip flask.
The coin is dated 1967, but it may have been made in the 1970s. While this has hallmarked, I can’t authenticate whether this is Sterling Silver. 
Very unusual. The front has a design with the four emblems of the United Kingdom, with the date 1967. The centre of the hip flask has wear and the silver shine is worn - possibly from being removed from a pocket. On the reverse is Queen Elizabeth’s head.
The base has two visible stamps and one very feint stamp. 
In good vintage condition, except for the wear on the front and a scratch on the lid. Please see photos for more details.
Dimensions:
Width: 95mm (3 3/4”)
Depth: 25mm (1”)
Height: 110mm (7 1/4”)
Weight: 185g