Depends what kind you get, many flavours and companies just like soda pop companies, best to go to your local health food store buy bulk jugs out of fountains like filling up water jugs - or even learn to make your own, I read it's pretty easy but never tried myself.
Health food stores have individual bottles too for few dollars a bottle, each company just like pop companies will taste different of course.
I like this company and they ship for free if over $100:
https://jagasilk.com/product/kombucha-jun-330-ml-12-pack/
Taste like carbonated Chinese green tea with hint of honey.
I've had other flavors that are bulk prices like filling up big jugs that are good too, at health food store can choose flavors like root beer and ginger beer and all the other flavors you can think of like Pina colada and cherry etc.
Mostly it tastes like whatever tea base is used then lightly flavoured with whatever natural flavours they choose to add - less sweet than juice and pop for sure because the fermenting process eats up the sugars in it and leaves healthy enzymes in told.