Forget that secret spring in the heart of the Rockies. Coca-Cola uses Calgary tap water for its Dasani label. Spokeswoman Wendy Kuboto says the water goes through reverse osmosis.

But the celeste blue bottles of Dasani continue to evoke hesitation among water drinkers who can’t bear its metallic aftertaste. In May 2023, Tap Score analyzed samples of Dasani to investigate ...