I've been using a messenger bag for over 20 years. The vest I was using previously was just weighing me down too much.
The latest iteration is what's called a "Tactical Bag." I've been carrying it since 2017.
I use the bottle holder to carry my box call. I have a foam pad clipped to it so my butt stays dry.
The nice thing about a rig like this is that I can shed it when I get somewhere.