A spirit safe or intermediate spirit receiver is an enclosed device used in the distillation of

Scotch whisky Scotch whisky (; sco, Scots whisky/whiskie, whusk(e)y; often simply called whisky or Scotch) is malt whisky or grain whisky (or a blend of the two), made in Scotland. All Scotch whisky was originally made from malted barley. Commercial distil ...

. The distillate from the still passes into it, and can be seen through the glass sides or windows, but cannot be directly accessed. The distiller can analyse the spirit inside the device, and decide where it should be sent.

References

Distillation Scottish malt whisky {{whisky-stub