no matter how much you wrapped it up and slathered it in peanut butter and coffee grounds and gasoline and compressed it into the center of a golf ball with twenty stink bombs poured over it all, the dog would still smell it.

This is because to package anything, you have to initially touch it. When you touch the weed to package it up, on your finished smell-proof package, there will still be some weed-smelling residue on the surface.