Leaving a scoop in a container

Hey, I’m getting new Rubbermaid Brilliance containers for my dry baking ingredients. I was wondering if its ok to leave a scoop inside the containers, say like resting inside the flour or sugar - does it degrade the ingredient, does it contaminate? And would stainless steel or BPA-free plastic scoops be better? Was thinking that would be so much more convenient than having to use a spoon and clean it every time. Would love to hear your thoughts. Btw, I may not be able to reply because this site always has problems posting replies for me. Thanks!