Wow, Thanks for the thoughtful responses- I've been digesting the info and trying to brainstorm some ideas.

Steve- thanks so much for the links- I did find the site and studied their offerings- the ones designed for venemous snakes are a very interesting design!

Stefan-A I've been thinking hard about your idea. It sounds like you'd like a 'Swiss Army' does everything container. Problem is, that like any machine or system, the more things you try to have it to, the more ways it can go wrong!

The simplest design I can think of would be a sixpack sized soft cooler with an inner transparent lid that zips snugly in place. Problem with this is window screenings and mesh aren't terribly transparent, and clear vinyl would wear, scratch and tear rather quickly. Zipper installation would be tricky too- something between a sleeping bag with a zip on insect veil and a pup-tent with a double window and door that zip shut in layers.
Very tricky , hard to make escape proof, and probably pretty expensive. How much would a system like this be worth to you? I'm not sure I could make it cost effectively myself *or* be able to sell enough of them to make having a batch run up overseas work out.

Rhea- The tent pole idea is workable. Plastic corset boning can be inserted into casings to make a sort of Mini Pup tent. They would have to be removed for cleaning, but that wouldn't be hard. If I go Eco-friendly, it will probably be by recycling materials like Snakeknots Pants leg.

I'm thinking about fully flat felled (Like Blue Jean seams) bags with tucked bottoms and a double closing top using both velcro securing straps and drawstrings secured by spring locking toggles. (You often see these toggles on ski-jackets.)

I'm going to start with some simple cotton prototypes and see If I can come up with anything I'm happy to put my name on.