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To add: drink water throughout the day in general. Especially where tap water is safe to drink. You’re going to pass up the opportunity to improve your health and daily wellbeing, easily and for free? WHY?
Random side note. I actually prefer room temperature water. Sensitive teeth. And i try to keep my backpack as light, so it’s a one layer water bottle for me.
If I’m doing any kind of physical activity it has to be room temp or my stomach complains. But otherwise I like it a bit cold. And I agree on the weight thing, if I’m camping or otherwise away from convenience, I want a single walled, lighter container.