Fravigar, the producer of traditional humbugs, use Viskrings to provide a tamper-evident seal across their range of products.

Viskrings are made from cellulose and are stored in a preservative solution. They are applied by hand to the jars and dry naturally, shrinking to a tight fit as they do so.

The jars are made of glass and the cap is moulded HDPE. The Viskring seal secures the cap in position and provides a tamper-evident seal which must be broken before the cap can be removed.

John Fravigar, the Managing Director, says "We chose Viskrings because they provide a smart and effective seal, and are very easy to use".