Great idea for draft stoppers, Diane! I'm going to keep that one in mind once the snow comes and the air turns icy.
Yes, I've heard of using men's tube socks to make 'bed buddies,' too. I would think as long as you're using the same or similar material(s) inside, it would work. Rice seems to 'mold' well to where the pain is and the bed buddy is placed; maybe because it's so fine. I love the idea of using lavender, too---maybe a nice mix would work??