I began my tea drinking change a year or so ago, and it is working for me.
I have my first cup in the morning with skimmed milk. For the rest of the day I drink hot water, kidding myself it was tea. Try it, it worked for me. Especially as one of those husbands who constantly says put the kettle on darling!
I stopped drinking coffee about ten years ago. Which is good but about a year ago Phil
Discovered proper coffee . Fortunately he buys the beans, grinds it by hand and then makes a latte for us both. This is real treat and not one I want to change.
BUT it has got me thinking about fruit juice. We buy the big boxes and also the individual ones. The latter are good as they can limit the amount you drink.
What I could do is check which juices have less calories and maybe think about always adding water to the juice. Making this a change for life.
I did wonder about alternatives and tried coconut juice last week as I think I have an intolerance to cows milk. Didn't check the calories though.