Alternative to plastic or aluminum, ALTspring stainless steel bottles contribute to your overall wellbeing, helping you stay hydrated and happy. The bottle’s body was welded by laser from 18/8 kitchen-grade stainless steel, thus making this bottle safe, practical, resistant, elegant and durable. Due to the materials used in the manufacturing process, ALTspring is the perfect companion for your active and passionate lifestyle and your next adventure. The cap is made from one piece of stainless steel topped with sustainably harvested bamboo, a metal loop providing a handy attachment point and a medical-grade leak proof silicone ring.