This pretty much fixes me up for soda. I guess what I really like are the bubbles.
seltzer water
fruit juice
Almost fill a glass with seltzer water, then pour in a splash of any fruit juice. Mostly I just use orange juice, but sometimes sweetie man gets this fancy mango green tea and that's really good.
Really, just a splash, probably about a quarter cup of juice. So this doesn't count as a fruit serving, just hydration.