Meet the OKO H2O Odyssey: a versatile water battle with filtration and lantern. It includes two filters for two levels of filtration. You also get a drinking cup and a flashlight that doubles as a lantern. The storage cup holds 8 ounces of liquid. The below videos give you a better idea how this water bottle works:
The OKO H2O Odyssey water bottle sets you back under $50 at this time.