The actual stopper is made out of a high graduate steel in combination with rubber (suitable for the food industry) and fits a wide range of diameters.
The stopper is hidden by the actual design of the top and the results are mainly meant to be for the kind of drinks you normally keep over a longer period of time like Port or Grappa.
The idea is to be able to present these kind of drinks in an outfit, which can also be part of a table decoration.
