Portable Waste Holding Tanks

I carry mine in the back of the pick-up. BUT .. it never has odors. First, when dumping it, it's always rinsed out. A couple times during the summer I will add a bit of bleach water and splash it around and then drain and rinse the bleach water. At campgrounds, after dumping, I rinse. When putting the caps back on, the tank is sealed. No odors. Even after sitting all winter, when I open the caps the first time, there's no odor. The secret is to rinse very will, then you can store them pretty much anywhere. (FYI, I've had this tote for about 15 years now. I replaced the wheels once. Still works like a champ. I've lost the little garden hose cap several times. I keep extras now.)