[istorical]

Doing so seems incredibly wasteful and pollution-generating. A filter pitcher like a Brita + a reusable water aluminum/glass/steel/whatever water bottle seems like it'd be a better substitute.

[JPLeRouzic]

Doesn't it add (chemical) salts in water to remove impurities such as calcium? [0] Can't those salts create hypertension [1] ?

[0] https://en.wikipedia.org/wiki/Ion-exchange_resin#Water_purif...

[1] https://en.wikipedia.org/wiki/Hypertension