Imagine a balloon—a standard latex party balloon. You put a tiny seed in it. A watermelon starts to grow. You pick up the balloon with the watermelon growing inside. You carry it with you all day. You sit with it, stand up with it, run with it, take it wherever you go. What happens? How long will that balloon hold up?
Now imagine the same scenario with a stronger balloon, a Mylar balloon, with reinforced seams.