What a perfect, perfect size for a neck, for that space between your neck and the outside of your shoulder, for a knee, a headachy forehead and the list could go on. I have used the 2 I have for months and months and loved them. I have used them hot and Ive used them cold and both ways are great. No leaking! These were so good and at such a great price, that I ordered 1 more for myself and 2 for my best friend. Get them while you can, youll love them.