What's the best water bottle to bring these days. Preferably something easy to tote or we can hook to a backpack and holds a decent amount without weighing a ton. Doesn't really need to keep anything super cold because we are typically room temp water drinkers I started looking and was immediately overwhelmed with options. Also, what would be our option to refill? I don't think I want to use water fountains if they are even available...do we just need to get ice waters when we order food to top up the bottle since we can't just stroll in to most places right now??