During summertime a lovely icecream is just what you need. Why not make your own fruit based flowerice?
Create any fruity color liquid you like and add flowers for decorations.
It should probably be a clear liquid as blueberries and strawberries set a quite marked color.
What about apple juice with floral decorations? Or apple flavored water.
If you boil watermelon you will keep the taste, but loose the color. That is also a great option. Yummy.