Actually lets be real, the vibe of sparkling water is being opened once, left in your nan's car and going warm and flat, only for you to accidentally take a full gulp and instantly wretch.
I am the same way. I have drinks inside for family/friends. But instead of grabbing a water, I just grab a zero sugar soda. I think for me its the carbonation I like not the drink itself.
Weirdly when I'm away from home I'm fine, i only bring water with me and fill it up regularly, if I'm eating food I generally just drink water, it's when I'm at home that's the problem
I order in a crate of oolong tea cans once a month. It's a good substitute as it's really refreshing when cold but contains no sugar. Problem is when it's hot like it has been lately I get through them way too quickly.