What are you using to fill the hollow handles?

[Redstickjohn]

I use wine corks, both natural and synthetic. I also use pellets, BB's, and lead shot if I need to add weight. Top it off with epoxy. Works great.

 

[Kostas1]

Pennies, Epoxy, BBs...but usually just some silicone or acrylic sealant I have lying around for home repairs.

Weirdly enough, my brush is dry but my window is leaking...hmmmmm

 

[EFaden]

I think the answer is that basically anything will work... it just depends how much weight you want to add.

 

[Jut]

plastic grocery bag