Nothing beats an old-fashioned red rubber hot water bottle for sore muscles . Covering your bottle with a soft, hand knit case will not only help the water stay hot (or cold) longer, but feels wonderful on achy limbs. Use soft yarns and a fun color pattern to create your own one of a kind cover and bring comfort to the whole family. With this deceptively easy to knit slip stitched pattern, the knitting goes quickly and is sure to impress.