OKO H2O Level-2 Advanced Filtration Water Bottle - State of the Art Water Filter Technology originally designed for International Space Station, sophisticated technology simple enough for kids to use - Bottle Made of 100% FDA Compliant Materials, BPA Free, Cap is made of Tritan clear hard plastic, simply squeeze and sip, no pump required - Filters 100 gallons (400 refills), Does not leach chemicals or small, filter media is very durrable--not fragile like glass, holofiber, and ceramic filters, Replacements available - Extremely Lightweight ( 5.2 oz ), Versatile, Portable, Easy to Pack, removes bacteria, e-coli, crytosporidium, giardia lambia, viruses, reduces chemicals, heavy metal, flouride, chlorine, etc - Ideal Uses: International Travel, Survival, Hiking, Sport, Camping, Personal Everyday Use Bottles, Adventure Racing, Mountain Running - Compare with brita lifestraw sawyer pur katadyne berkey bobble h2go msr, etc