When I was a kid, winter beds were warmed with a hot water bottle wrapped in a towel.
This worked okay, but inevitably the towel slipped off during the night and the water would slowly chill. It wasn't unusual to wake in the early morning hours with a cold rubbery slab at your feet—not exactly comforting.
Microwaveable rice bags stay warm and don't slip around. I thought I would make a rice bag that's a tribute to the old-fashioned hot water bottle. It's a simple project that can be done in an hour.
Bonus: if you applique a heart onto the bottle, you can give it as a Valentine to someone you have "warm" feelings for (ouch!—sorry).