also fresh water from a river is not enough.
If the water come directly from the top,, it doesn't have enough time to get all the minerals. Is good water but is not giving you all you need.
But I always use a filter if I drink from a river or a creek.

I personally avoid CC products. You probably find good local alternatives, look at the bottles labels and start comparing the components inside. It's also a good way to learn ;)

Natalia

That's a great question. There are online many bottles that have some filters included, you usually also find it in outdoor stores. 