Soap used for scenting drawers
Various flowery scents, whatever we happen to have left in various colors. Just put inside a soap sleeve and hang in closet or put in a drawer or car. This type of soap will not sweat and does not need to be in a specific temperature. It may melt if in a very hot car, just like a candle or other object would. Keep in an old sock or dish of some kind and it should be just fine!