OKO Odyssey is a multi-functional six-in-one water bottle. It includes two filters for two levels of filtration (L1 & L2), a drinking/storage cup and a flashlight which also doubles as a lantern. Just reverse the flashlight to make it a lantern. The light has a mode which turns the bottle into an emergency beacon or strobe. The bottle is great for gyms, camping, hiking, travel and RVs. Drink/storage cup holds 8 ounces. Package includes: Bottle, OKO Level-1 Filter, OKO Level-2 Filter, Storage Unit, Flashlight/Lantern, Handle/hook and World Water Quality Chart. Capacity is 650ml.