In the past few years, we have covered plenty of cool water filters here. The CamelBak Eddy+ Water Filter Bottle is also worth a look. It has a 2-stage filter straw to give you access to clean water as you go hiking and camping. It is available in 20 & 320z sizes.
This water filter bottle removes almost all bacteria, protozoa and other dangers. It also has an ion exchange filter to reduce chlorine, lead, and bad odor.
[where to get it]