Oh my goodness. There are so many things. I am also a mom who gets very anxious when I go grocery shopping, with all the plastic.
My top items would be single-use coffee cups and lids, because we know they're so challenging to recycle and they are consistently found in the environment.
I would like the government to do a full assessment of cigarette butts and alternatives to them, because we know they are also one of the most commonly found littered items in the environment and are contaminated with toxic chemicals from cigarette smoke.
Another is all forms of polystyrene, because it fragments into small pieces and ends up all the places it isn't supposed to end up. I would love to see a ban on that.