For one month you can't buy anything with packaging. So no packaged food, no take-out food, no bottled drinks and if we're being honest no restaurant meals either. Everything you eat is made from scratch and you need bring your own containers to the grocery store. Pretty hard eh? Now think about everything else you buy that comes in a package and nix that too. I think it's doable, but next to impossible. So what if the challenge was no unnecessary packaging and any packaging you did buy had to be easily recycled? That would limit you to pretty much glass and paper/cardboard packaging. Easier to do than cutting all packaging out but still pretty hard.
So could you live waste free for a whole month and produce no garbage at all?
I'm not a human in real life, I just play one on the internet.