I made a few of these for my soap gift baskets I gave at Christmas. It was very simple and seems like such a nice little luxury.
For the filling I mixed split peas and lentils in a bowl(I used what I had on hand. Using flax seed or buckwheat are popular too). I added some dried lavender and chamomile. Last I sprinkled about 10 drops of lavender essential oil(more or less to your taste or to what scent you use). Stir it up and place about a cup into a pillow.