Whether on the go, emergency preparedness or for daily use, be at ease knowing you have clean drinkable water with the new ProOne® BIG II Gravity water filtration system.Easy to set up. No electricity or plumbing required. Use with just about any potable water source whether at home, office, school, camping or traveling.All ProOne® gravity systems feature ProOne® G2.0 “all-in-one” NSF/ANSI-42 component certified filter technology – the smarter filterTM. Independent lab tested to NSF standards 42, 53, P231, microplastics,1,4 Dioxane, Microcystin, emerging contaminants, PFOAS (GenX), TTHM’s, bacteria, Fluoride, Lead, Parasites and more. Visit our lab reports for full details on the 200+ tested contaminants.The new ProOne® BIG II Gravity system features exclusive design for viewing how much water is in the lower container by just looking at it. The BIG II is made from heavy duty BPA, BPS & BPF Free plastic for long lasting durability and includes a BPA Free plastic spigot.