are plastic bags from grocery stores good for storing small items scent free? I know garbage bags are no good because they have chemicals implanted to reduce bad smells of garbage. are standard shopping bags pure plastic? of they are not what type of bag should I use.

any thing can contain and hold a scent
I gather if you really wanted to use grocery store bags, youc an wash them a and air dry them, but most are NOT air tight, so, placing things in them, is sort of a loss cause IMO

they sell better more air tight containers that hold things and in them you can add some things that give off more natural scents, like pine tree limbs, acorns, cedar, even fresh dirt!

the more things smell like the area you hunt IMO the better,
but don;'t add natural things that AIN"T in the area you hunt either,,
as it can back fire
over powering smells also get a deer nose to notice IMO

if set on bags, I had good luck with Cabela's DRY BAGS, 100% water proof and pretty darn durable
but do get stuff when temps drop!