The hot water bottle is ideal for baby and mother, but not only that! The whole family may need it.
For baby
Relieves colic in infants, reassures baby with heat and thus allows more peaceful falling asleep without arms, warms baby during outings for example by putting the hot water bottle in the footmuff or carrycot, also warms the towel when getting out of the bath, or the cradle before putting baby to sleep...
For Mom
It relieves menstrual cramps, relieves lower back and neck pain, for breastfeeding in a hot version it will stimulate your lactation...
For the whole family
It will be useful to relieve pain, muscle cramps, to warm up and have a comforting time.