In Ant-Man, we're introduced to Pym particles
and a few knock-off versions of Pym particles
, which when they're exposed to matter, cause the matter to shrink in size. Yet obviously they're stored in a manner that prevents this shrinkage from occurring.
But we see them sprayed onto animals, dropped from a pipette, and used in weapons.
And in each of those uses, only the target object gets shrunk. So how do the Pym particle storage and delivery systems avoid being shrunk?