Haters need to look closely at the add again.
The bottles are not "opened" by the action of placing two caps together and twisting.
What appears to happen is that a spinning cap placed over the normal cap can be forced to jam against the bottle drip ring by being pushed against a similar cap. Twisting that, breaks the spinner and allows it to be removed. So the drinker can now access the real cap underneath.
Still a dumb idea though!