How can I keep a long time in the hot water bag
Install water at night to install more than 3/4, at the beginning of the safety or not to install too much, but the more sure to hold more time to stay longer. With a big towel. Buy that thick. A wrap (this is not easy to burn, but also keep warm).
The meaning of hot water bag: hot water bag is made of rubber or waterproof material bag, through the heating liquid, so as to achieve the purpose of heating. There are two kinds of hot water bags, one is mechanical, through the addition of hot water to achieve the purpose of heating; the second is the electric heating bag, the inside is filled with special oil, through the plug-in heating to achieve the purpose of heating.
To buy the kind of warm water bag first, that is red or green rubber, buy a large enough, (sufficiently large) "or" don't touch too thin, water should be installed at night (more than 3/4, a start for safety you still don't pretend too much, but more time is sure to long). With a big towel... Buy that thick. A wrap (this is not easy to burn, but also keep warm). While the hottest when a blanket.... Forgive me for the laity... I will adhere to the high school that the school did not languish sweet, North heating.. The bedroom is frozen in the morning.. That's what I insist on... Don't believe that the new warm water bag the garish. Do not believe that kind of rechargeable warm water treasure (but the kind of class is very comfortable to hold, if you can charge the classroom).OVER...