A Nosing Glass
This is one produced for the SMWS but they are available from many other
specialist shops (e.g. whisky retailers and distillery visitor centres).
There is no doubt that they do make an enormous difference if you are seeking
to make a detailed assessment of a whisky.
I have heard it said that the 'original' nosing glass comprised a spherical
bulb with a tubular chimney on top but I have not seen this confirmed.