I typically go through one 22-24 oz water bottle per 10 miles during the summer months - and more when it is hotter
recently did a short ride that finished @ 90 degrees - I went through around four 23 oz bottles (plus) in around 20 miles …
rode a bike with just one cage - but planned route with water stop at the halfway point
in addition to the planned stop, on the return ride I stopped at a trailside oasis: refrigerated cooler with great tasting cold water …
… placed there for trail users by a 96 year old cyclist (outstanding !)..
Wow. That's a lot of water. I just came back from a 3.75-hour ride that started at 89 degrees F and ended at 97 degrees, and I drank about 16 of the 24 oz of warmish tap water in my bottle. I weigh less than 120 lbs, though, so there's that. And I drank a cup or so of water before rolling out the door.