If it has 15 calories it can't be just water. Maybe they removed alcohol, but it looks like everything else (possibly additional stuff to maintain similar taste was added) was kept.
I was drinking Liquid Death for a while because I really liked their Mango Chainsaw seltzer and then one day I looked at the ingredients and found out why. They put agave nectar in it to sweeten it. They're doing similar things here.
I've never had one. I know it says white claw but which animal's claw is white does it taste like? I'm not a animalogist so they might be expecting a little too much from me as a potential consumer.
Do they squeeze the juice out of each claw or do they just blend them all together like animal bones in pet food?