I'm pretty sure its a NO to the bottled water with the soda card. Its just the fountain soda, not in cans or bottles. Actually the tap wate onboard is not bad at all, just drink that in your soda cup if you want.
I agree with Donna (again !). The ship's water is very good. The soda card doesn't cover bottled water.
You can buy a bottle of water as you leave the ship for your excursion, or you can bring your own bottle, fill it, put it in the fridge and take it with you on excursions.
We usually forget to take it with us , and end up buying a bottle on the way off the ship!
"A truly happy person is one who can enjoy the scenery on a detour."