If you are considering this product, you should know that the lid is defective - there is no possibility to install carbon filters. There is literally no mechanism to attach a ring to hold the filters in place. The photo on the packaging is completely wrong. I even called the company to alert them. No one cares and Revane just sent me another defective product as a "replacement". Apparently he's coming back too. All well done! My advice: don't waste your time and money!