Aquaovo The Alter Ego Personal Filtration Bottle by Alter Ego Technology has been used by millions of military and disaster relief workers for over 10 years Removes harmful urban contaminants like PCBs (94.5%), Fluoride (85.5%), Lead (97.5%), Arsenic (88.9%), Chlorine (99.99%), Aluminium (90.0%), Radon 222 (99.0%) Removes 99.9% of Giardia and Cryptosporidium Filters up to 750L of water with no after taste, carries 650mL Washes and fills up easily with removable top and bottom Squeezable bottle allows for increased flow rate Straw assembly can be used on its own as a survival straw with increased portability Globetrotter model will also remove 99.9999% of both Viruses and Bacteria BPA free materials Filter allows for beneficial trace minerals like magnesium, calcium and potassium to remain in water