I had assumed that with the obvious connection this might possibly have held matches, originally, and was going to post with that thought. However, have just found reference to the piece in Thompson, showing in fact that it was designed as a salt - perhaps the blue colour should have given me a clue - and called 'Design for Salt Cellar (Scuttle Shape)'. Quite small at only 2.25" tall, and not perhaps the easiest thing to take a 'pinch' from. The Rd. No. is 510504 (first registered August 1907), and unfortunately been thru the wars, but will keep as unusual and a bit quirky.
Reference: 'The Identification of English Pressed Glass - 1842 to 1908' - Jenny Thompson - 1989.