Yup, a lot of waste. I had a couple of the self-heating MSR meals they sold a few years ago and, while they were great for snowshoeing day trips there was a *lot* of stuff to tote and throw away.
With the self-cooling can, I was thinking that it could be adapted to become something like a Jetboil pot, with all those heat-exchanging chambers and all. Will need to dissect one at some point!