1 cup of lavender combined with 5 cups of rice microwaved at 2 minutes will give off a wonderful, relaxing scent of lavender and stay warm for hours. This is a great way to warm your bed on these cold winter nights.
Use for any reason that you would use a hot water bottle. The inserts are the size of a standard hot water bottle and the fleece cases are a bit larger. The fleece cases are washable.