My husband has been in contact with Dr. Joseph Falkinham, a national expert, who shared a 12 page document (revised 11/20/19) on reducing exposure to NTM. As a MAC newbie, I found it to be the most specific and comprehensive information I have read to date. If people are interested, what is the best way to share this document? One of the many topics he addresses is traveling and he mentions a water bottle study. In a follow-up communication he identified the water bottles as LifeStraw, Mountop, and SteriPen, all available on Amazon. If there is a way to make this available on this site with everyone, please let me know. Thank you all!