And that's perhaps another exciting element of this new microwave oven technology—you don't need to keep it on a counter. In fact, one microwave oven, called Adventurer, which was crowdfunded in 2014, is basically like a large thermos that you can carry around with you. At just a bit more than three pounds, it wouldn't likely strain your back. Though, it currently would drain a battery at least twice before finishing your meal, so it's still in more of an experimental stage.