The whole point of this bottle is to have a visual reminder to drink water and to track the volume throughout the day.
They have put the water level guide on the opposite side of the water opening. What this means is that if you have the opening facing you, as any normal person would, you cant see the markings. To be able to see the markings, you would need to take a drink, then when you place it down, rotate the bottle 180°, and then do the same before taking a drink.
Good idea, just poorly implemented. Don't waste your money. It has turned what could have been a useful, "functional" item, into a gimmick.
When i questioned the seller about the design choice, their response was "we have given some thought to turning the water level marking to the front of the bottle before. But, in the end, we have decided to keep the logo in the front for reason that the design would not come natural and it is ugly if the logo is moved to the back of the bottle."