Topic summary
Pym Particles

Extracted from the Wikipedia article Hank Pym.
Successors
There are a number of characters in the Marvel universe that have also used the "Pym particles" to effect size changing. These include Janet van Dyne, Clint Barton, Bill Foster, Scott Lang, Erik Josten, Rita DeMara, Cassandra "Cassie" Lang, Eric O'Grady, Tom Foster, Shang-Chi, Raz Malhotra, and Nadia Pym. Although they do not use their powers for altering their size, both Wonder Man and Vision derive their powers from Pym particles.