My wife has is in first trimester (11th week) , she has a basic doubt, that water must required for every day to balance fluid in the body, but I say any fluid can be taken but not necessary water, If someone can take juice or meal replacement drinks of 2 lts/day than she does not require to drink water? My wife says, water is a must even though someone take fluid (other than water). Is this correct?

so an example if someone drinks 2lt of juice in a day, so she does not necessary to drink water. is this correct?