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.
2A 1B, from a tap
I'm a 4A 1B myself, also from a tap (filtered). 4A is important so it doesn't get hot in my backpack.
Easiest to clean, fastest to chug, can leave that glass next to the sink all day for more chugs.