Question: how many cups of water does a swell bottle hold?
Answer: Product. The company sells bottles that hold 9 US fluid ounces (270 millilitres), 17 US fl oz (500 ml) or 25 US fl oz (740 ml). The bottles are reusable and include triple-layer insulation. The manufacturer claims the bottles are non-leaking, non-toxic and they keep liquids cold for 24 hours and hot for 12 hours.