Hello Tabata,
This is a good question and you should know that they don't sell accessories here... either bags or the air freshener, which has to be changed every 60 days. I received the appliance following my order on this site and it was missing the air freshener... I have asked several times for them to send me this part and it is not possible for them because they do not sell Catlink accessories... very disappointed. And be careful, I haven't found any on any site that delivers this air freshener in Switzerland for the moment...
Good luck with your research.