I am so happy to see a concern over Nalgene. I stopped using Nalgene a year ago after doing some additional research. I have switched to a stainless steel water bottle for not only myself but my husband and kids now and it was an easy change. We're using a cynergreen bottle (www.cynergreen) and their kids bottles. They are heavy duty and work great. I would recommend this as an alternative to any kind of plastic.