For use in the Sangenic Hygiene Plus+ Nappy Disposal System only, the cassette is easy to fit and features the germ-seal anti-bacterial film which lasts approx 1 month. They use 60% less plastic than premium nappy sacks and 40% less plastic than previous nappy wrappers. The Sangenic Hygiene Plus+ refill cassette is an advanced multi-layer, anti-bacterial film, which locks away germs and odours. The film keeps on killing germs even while the nappy is disposed of in the tub, for maximum hygiene protection. The Sangenic Hygiene Plus refill cassette gives unbeatable odour protection. Twist-lick technology individually seals each nappy, locking away germs and odour. The system is scientifically proven to be 100 times more effective at odour prevention than nappy sacks. Just drop the cassette into the top of the tub and it's ready for use in seconds.