New stainless steel thermos 500ml! With double walls, to enjoy iced water or a hot drink, for many, many hours! Made of 304 stainless steel (18/8 stainless steel). With FDA & SGS quality certificates. Without aluminum and toxic substances (BPA free). It doesn't break. 100% recyclable. With double walls, to maintain the temperature for more hours. Why should I choose a stainless steel thermos? 1) The most important reason to say "yes" to stainless steel tumblers is their healthy material & great durability. Since they don't break if dropped, they can be used for a much longer period of time than regular buckets. 2) Stainless steel is the most hygienic & safe material, as it does not contain Bisphenol & Carcinogenic substances, as is the case with some poor quality plastic or aluminum containers. In addition, stainless steel does not collect bacteria, even if it is scratched. Don't forget that it is the first choice of material for manufacturing hospital accessories & kitchen items. - Not suitable for carbonated drinks.