What counts as water

Any liquid. I prefer not to count anything that has calories or caffiene, but that's personal preference. Everything liquid that you drink can count toward your water goal.

Only plain filtered/unfiltered water should be tracked as a cup of water. Tea, Coffee, and other beverages are their own food items.

Everything wet except booze (because it dehydrates you). There used to be a rule that anything with caffeine didn't count because it's a diuretic but that was debunked.

I don't track water anyway. Your body knows when it's thirsty, drink lots of drinks with no calories.

I only count water as water. Lucky for me, I don't have problems consuming a lot of water.

Mayo clinic, and other experts, say most people get enough water from the food and beverages they consume.
Thirst is an indicator of the need for water.
There are things to take into consideration too, like, activity level, climate etc.

I don't track water, but almost everything that contains water counts towards hydration, including vegetables, fruits, soups, milk...etc.

Water does not cease to be water when things are added to it. Water instead celery is still water, crystal light is still almost all water, tea? Almost entirely water...also you don't really need to track it. The water companies have funded these ridiculous studies that tell you to make your teeth float with nothing but unadulterated pure water. Your body magically tells you when you need water, it's called thirst.

And WebMD agrees. You need to be hydrated, and you can get that from foods as well as beverages. There's a reason it's called "watermelon", after all.