, as I have noted many time, the Buzz is a great source of information
Based on my experience with these vittles containers on rivers, I will continue to use them for things like charcoal etc but not for things that need to be protected big time. Like TMACC posted, continue the search.
For me the eco safe units are pretty much bomber plastic plus being in a rocket box that gives the engineer in me a double safety factor. I just got off a san juan float and even now it is hot and sunny out west. The thought of a vittles box full of poop building up explosive gases on my little mini cat pretty much scares me big time.
My advice is to save your pennies and buy a real poop container from a top notch supplier. The reason these vittles boxes are so cheap to buy is because they are made of thin molded plastic designed to keep dog food in a covered building not poop on a super hot sunny day outside anywhere.