If you do the regular maintenance on your external system, it should not have any odor when in use. I rinse mine out with vinegar, and let it air dry hanging in the shower, then it is ready to go for the next day. They do sell deodorizers for Ostomy stuff, that works, but vinegar is cheaper and effective. I also change bags about every 7-10 days when I use the system often, which is not that common anymore, but still used when traveling.

Puffy