Used to grind fresh every time but I have a tiny air tight container now that I use to make reloading easier. I only keep about 3 bowls worth in it though.
I'm not a heavy smoker so 3 bowls lasts me for the entire work week
I bought a tiny one from "Jyarz" but there are plenty of options out there. I do like my Jyarz though. There's no odour leak, and it keeps the weed fresh