There's water bottles and then there's these oversized straw cups that are typically filled with the most insane sugary coffee or soda.
First one is practical and healthy, easy to be carried in a backpack and you drink when you get thirsty then put it away, second one is what Americans tend to buy at a drive through, use in their cars, slurp on it for hours and carry it in one hand like an accessory when leaving the car.
I'm just saying, there are plenty of canteens that are shaped to look like this. I know of at least one person who only drinks water from theirs. Some people just prefer sipping from a straw.