1. On a cold winter night sometimes it just feels impossible to warm up. You can crank the heat (and crank up your bills), you can plug in a space heater (which has risks and costs associated as well), or you can take the old-fashioned route and use a hot water bottle. Simply fill it with hot water and stick it in your bed, under your blankets, about 10 minutes before you plan to hit the sack. Your sheets will be warm up in no time. 2. If you experience regular back pain then a hot water bottle is a really good investment for you. According to Lauri Grossman, DO, a licensed chiropractor and the founder of the Department of Homeopathic Medicine at New York University, using hot and cold therapy can help ease back pain. She explains "cold therapy (applied via an ice pack) works better for inflammation and helps to reduce swelling, while heat (via a hot water bottle) is ideal for reducing cramping and muscle spasms." 3. While pain medications can work to alleviate menstrual cramps, try a more natural solution by applying heat to your lower abdomen with a hot water bottle. The heat has been said to relax the uterus, as well as reduce constriction of your blood vessels and improve blood flow to the uterus, all of which can help ease your cramps.