You can make your own microwave popcorn with a brown paper bag, a teaspoon of oil, and a little salt.
(May not be what you're looking for, if you really don't want to nuke oil. But maybe someone else might like the idea.)
Recipe here.
Cleanup is easy.
I find those hot-air poppers to be a huge pain. Mostly because they blow the popcorn right out of the bowl and all over the kitchen. I have to create a cover with tinfoil to keep the popcorn funneled into the bowl.
S.