My vote goes for Bouncing Boy:
Bouncing Boy is a fictional comic book superhero appearing in publications by DC Comics, usually as a member of the Legion of Super-Heroes. Born on Earth as Caleb Martin , Bouncing Boy has the power to inflate like a giant ball and bounce around. This combination of invulnerability and velocity makes him a surprisingly useful combatant. Born without any powers, he received his abilities by accidentally drinking a super-plastic formula he believed was a soda.
He even comes with a cautionary warning – don’t drink soda!