It should be warm to the touch, but when placed on your inner wrist be able to sit there and not get uncomfortable.Do i just microwave a bottled water and toss it in the box? How hot do i make it?
No, it won’t last all day, you’ll have to refill it every few hours. Just using hot water from the sink is fine, no need for microwaving the whole thing.So if i do this before i go to work it will be good for the day and then maybe reheat before i go to bed?