- Absorbs odours in the refrigerator ,- The activated charcoal in the filter absorbs unpleasant odours ,- Other foods therefore do not absorb any bad odours ,- Odour-free and 100% natural ,- Also ideal for portable cool boxes ,- Lasts up to 3 months , ,Note for Consumers: ,As soon as the article is removed from the packaging, the activated charcoal begins to work. The pouch inside the egg-shaped refrigerator filter does not need to be opened.