Is vacuum flask safe to use for drinking water?

Question

I read in one site that if the no. written in triangle at the bottom of the bottle if it is equal to 5 or more then 5 then it is safe to use..But for so many days I am having problem in my throat,I am thinking is my problem because of my water bottle.Can anyone tell me what should I go for..? Is vacuum flask safe to use for drinking water. ?

Answer 1

Yes as long as it is properly sterilised and you are putting good water into the flask.

Answer 2

The problem probably is your water bottle. If not cleaned properly and regularly a lot of bacteria can build up. I suggest throwing it out and starting fresh with a new one.

Answer 3

just boil the water for 45minutes or just use a mineral water