OKO H2O Level-2 Advanced Filtration Water Bottle, 1-Liter (Color Will Vary) O-ring carabineer used to carry or hook the bottle onto a bag Water bottle with Level-2 filter Filter produces superiorly-efficient filtration with a powerful flow Taste, odor and BPA-free bottle O-ring carabineer used to carry or hook the bottle onto a bag 100-gallon filter capacity; bottle is dishwasher safe