Quote:
we're down to -31C today,


Brrrr .. That's really cooold
And I was thinking 8 °C this morning was very cold.

Back to subject.


I don't think that water would go any kind of chemical reaction because of cold or heat. However, I am worried about the container. Stainless steel is OK, but plasticware and other containers may leach stuff in the water. Anyone has any studies about the containers ?