An unusual white metal topped crackle glass Whisky Noggin type jug - or perhaps a water jug to accompany the whisky?

Beautiful design, voluptuous body in 'crackle glass', with a plain clear handle.
An upturned head with a generous white metal top and thumb press lid raiser - all very similar to the traditional Whisky Noggin of Hukin & Heath fame.
This metal is unmarked, but looks very much like silver.
Pontil mark to the base.
Stands approx 15cm tall.

Thank you