Suitable for the Litter Locker II The film tube is the secret - smell under seal The Litter Locker II works with a cassette, which contains a special, multi-layer film tube. Thanks to this airtight foil tube, unpleasant odours and bacteria are thoroughly trapped. If the dirty litter of a cat from the litter box is disposed of daily, the Litter Locker must only be emptied after approx. 2 weeks. The foil tube is then pulled back from the cassette into the Litter Locker II. The cassette is made of 25% recycled material and the multi-layer film has an odour barrier.