I am guessing you want something small you can pack away while traveling?
I love this one. I am a great outdoorsman. I hunt, fish, backpack, and am into mountaineering. When not on the trail and my vehicle handy, I have ended up in shelters with no running water, electric, nor heat. They were much better than a tent though. I set up a kitchen with a stove and had plenty of lights. The final trick has always been to add a toilet somehow without going out. (Yes, we can all do that. But, it is nice not to have it required in freezing rain.) I used one of the below. The thing is great. It is very compact, easy to keep clean, and inexpensive. I found this to be very comfortable. It exceeded my expectations.
I bought mine at Walmart and stock up on extra bags from there.
I do prefer the recommended disposal bags. They work better than the best garbage bags, though grabage bags would work.
Manufacturer Part Number:9824-41W
Brand:Ozark Trail
The Reliance Folding Portable Toilet is ideal for camping trips and other outings where bathroom facilities are limited. It holds children and adults up to 300 lbs. With its plastic design, this collapsible toilet folds down to only 5 inches in height to take up very little space when packing. It also includes a Double Doodie waste bag to make cleanup fast and easy. Because it includes a bio gel that turns liquids into solid, there is no worry about messes to clean up on your vacation or outdoor adventure.
Reliance Folding Portable Toilet:
Collapsible toilet
Plastic construction
Folds down to 5" in height
Weight capacity: 300 lbs
Includes 1 Double Doodie waste bag with bio gel to solidify liquid waste