Get a Sigg water bottle or other aluminium water bottle and fill it with tap water. I recently purchased a Sigg water bottle to carry water for my walk to and from the train everyday (it is getting warmer now so I get pretty thirsty). These water-bottles are generally more expensive than a plastic water bottle but for your health you should not drink out a plastic water bottle.
Sigg (http://www.mysigg.com/) is the new hip water bottle and the prices range from $15 to $30. They are currently hard to find I tried to get one for my husband (who liked mine) and they were sold out everywhere I went! On their website they discuss that they are working to keep up with the unplanned demand… Julia Roberts apparently said “you have to get a Sigg water bottle” on Oprah… need I say more!
Make sure you fill it will tap water. If you are worried about what is in your tap water you can get it tested. You can get the Silverlake Research’s Watersafe All-in-One Kit at watersafetestkits.com. It measures levels of bacteria, chlorine, lead, nitrates, and pesticides (all calibrated to EPA standards). The home test kit starts at $19.95 but you could go all out and mail them a water sample for $149.95. To be honest you probably spend more on bottled water in a year anyway so if you really are worried it is worth it.
If you do not want to test you water but you are concerned about it you could get a Brita water filter to further ‘clean’ your water. Remember Dasani and Aquafina are only filtered tap water from the bottling plant!
So grab a water bottle, fill it up with tap water… save the environment and your wallet!