If you're water conscious like me that doesn't want anything "added" to the water, consider buying a home distiller. Just search for distiller in amazon for some ideas of what you get. It takes 3-5 hours for about a gallon. If you just queue them up during your work day. Just store the water in large glass mason jars and throw them in the fridge. Kick the plastic bottled water habits. It's not just BPA but tons of plasticizers that leech into your fav. bottled waters. My wife and I switched to this after we drank some Fiji from a gas station, after it had warmed up - all you can taste is plastic - even with the BPA free stickers. In the end we decided you can't really trust the companies distributing plastic bottled water because you never know which crate is left out in 105 degree summer heat during its various transitions. That's pretty disgusting if you think about it.
If you do go down this track you need to re-mineralise the water as pure water is damaging to the body as pure water will leach all the electrolytes from your body.
