infused water for tot

has anyone tried infused water with their tot? looking to add a small taste for my 1 year olds, they hate water and after starting whole milk and big kid food they've been very consitpated and I don't want to introduce juice. If so what kind of fruits/veggies have you tried? And how much? Like I said just enough where they can taste a flavor but not enough to make it strong, also trying to stay away from citrus in the water as much as possible, Thanks!