…because the shape of the water bottle isn’t uniform either. Part of my new year’s resolution is to drink 4 liters of water per day, so I spend a lot of time looking at those lines. Edit: 4 liters is a lot, but appropriate for my size and activity level. Without conscious consideration I don’t drink enough water. It looks blue because the bottle is blue.


Oh 10/10. I used to work construction and would slam a LOT of water on hot days. My comment assumes a more sedentary lifestyle (I was in uni at the time, and the gym is not as hard as roofing).
I agree with the other commenter, those electrolytes might be contributing to exhaustion. I used to cut gatorade in my water, found it helped. 0.75L water, 0.25L gatorade, adjust to taste (cuz watered down gatorade isn’t that good lol)