Don't use harmful plastic, use quality stainless steel. Only the best is good enough for you, that is why we have used food grade Stainless Steel 304 to produce The MAI bottle. Made in this fashion, the bottle will not emit any toxic particles and, in contrast to plastic and aluminium, reduce its environmental impact. If that wasn’t enough, the MAI bottle is designed in double wall, enabling the bottle to keep your water cold for up to 24 hours and hot for 12. We believe that design and function can co-exist while minimizing environmental impact.