You fill it with hot water, squeeze out excess air, close it up, hold upside down to make sure it doesn't leak - then sit and have the bottle between your back and chair, or apply to wherever heat is needed.
I have very hot tab water - so, that is what I use. If you heat the water on the stove, be very careful when filling and you might need to wrap it in a towel so it isn't too hot to begin with...
You fill it with hot water, squeeze out excess air, close it up, hold upside down to make sure it doesn't leak - then sit and have the bottle between your back and chair, or apply to wherever heat is needed.
I have very hot tab water - so, that is what I use. If you heat the water on the stove, be very careful when filling and you might need to wrap it in a towel so it isn't too hot to begin with...
Okay. There's one in my house, I'll try it when I get back aches. Thank you!