You could add whatever you like into the ice cubes - slithers of cucumber, lime, ginger, blueberries - my next try is going to be strawberry and basil, I think that will be perfect with the coconut water. The pomegranate does look really pretty though, and is perfect for jazzing up an otherwise boring drink!
Another way you can use coconut water ice cubes is to freeze them just as is, and then add them into smoothies in the morning. It gives you that kick of potassium and lots of other beneficial electrolytes, as well as chilling the smoothie and giving it a slightly sweeter edge than water.
I used a plain ice cube tray but I think next time I'll use an extra large one and add in even more fruit. Ikea also sell silicone ones in the shape of hearts and stars that might be pretty for my next experiment.
Adding a slice of coconut on a cocktail stick also makes your drinks look super professional. The drink in the photo below is coconut water with coconut water ice cubes and a slice of coconut - one for the coconut lovers!
You can buy Innocent Coconut Water in all the major supermarkets (they even do little cartons which are perfect for lunch breaks). My glasses are from Ikea (50p!), and the stripy straws are from eBay.
Have you tried coconut water ice cubes? What would you add into them?