Leak-proof and vacuum-insulated thermo drinking bottle. The Sigg Thermo Drinking Bottle Gemstone IBT is the ideal companion for all leisure activities, school, or the office. Its handy and functional design is elegantly complemented by the subtle black color. Thanks to its premium double-wall insulation, this thermos bottle is well-suited for various hot beverages, keeping them reliably warm for up to 12 hours and cold for up to 20 hours. Additionally, the practical screw cap ensures that the bottle is always sealed tight, making it guaranteed leak-proof. Made from high-quality 18/8 stainless steel, the thermos bottle is robust, although hand washing is recommended for a longer lifespan. With its ultra-thin inner body, it is also lighter and smaller than comparable thermos bottles. The drinking bottle is made from food-safe materials and contains no harmful substances, including phthalates or estrogen-active substances.