Sustainable Design. 500ml thermal flask made from recycled stainless steel. A perfect flask for those aspiring to an active and more sustainable lifestyle, in any season of the year. With an elegant design, the Calypso flask is produced with recycled stainless steel, an environmentally conscious alternative to plastic bottles that is even more effective. This product has high durability and, at the end of its life cycle, can be recycled again. Stainless steel has one of the highest recycling rates among metals (90%), can be melted and reused in the production of new products, reducing the need for new mining and extraction of raw materials. In addition, the long durability of stainless steel, low maintenance requirements, energy efficiency, and versatility make it a perfect choice when customers are seeking sustainable solutions, reducing their carbon footprint.