Once again, I'm testing the waters, so to speak (pun intended). I'm here to ask you one simple question: How do you like your water? Which of the choices depicted do you enjoy the most when hydrating yourself.
I would probably go with 2a 5b. Fizzy/sparkling and from a glass. Prefered slightly cold but not with ice.
I'm a 4A 1B myself, also from a tap (filtered). 4A is important so it doesn't get hot in my backpack.