SIGG Meridian Sumatra - Insulated Reusable Water Bottle 0.5L The Sumatra collection was created in partnership with One Tree Planted - for every bottle sold, a tree is planted, supporting worldwide reforestation. Our eco-friendly bottle is made from high-quality 18/8 stainless steel and natural bamboo, and it is plastic-free (gasket made from silicone). Excelent insulation is provided the copper-coated, double-walled design, keeping drinks hot for up to 13 hours or cold for up to 24 hours! It is easy to care for and comes in various tropical forest-inspired designs. All materials used are free from BPA and other harmful substances. • Swiss design and engineering • Material: 18/8 Stainless Steel • Key features: BPA free, leak-proof, insulated, food-safe, top available as spare part • Sustainable: one bottle plants one tree • Perfect for: travel, office, home • Care instructions : hand wash • Product height: 25.9 cm • Product diameter: 7.3 cm • Lightweight: only 290 grams