The Perforation of the Categorization System on Space Station

In the cateo goes a bag, but you said the bag was perforated. Why is the bag perforated? Because you have to have flow that kind of goes through the bag to hold the solid waste here while it's opened and you're using it. On the other side of the perforation is the bucket with all the other bags below it. And we have a cover that goes on top of that. So when you're done, you close it and then you turn off the fan. That way you keep the odors in the bucket. Most of the time.