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SIGG Gemstone IBT Obsidian Water Bottle 1.1 L – Leakproof and Vacuum-insulated Thermos Flask The SIGG Gemstone IBT Obsidian water bottle is the ideal companion for all leisure activities, school or the office. The simple black look is an elegant finishing touch to the convenient and functional design. Its double-walled insulation makes this bottle ideal for carrying various drinks, which it will keep warm for up to 18 hours and cold for up to 25 hours. The practical screw cap is guaranteed leakproof. Thanks to the 18/8 stainless steel construction, the bottle is robust. To ensure a long usage life, wash by hand. The super-thin inner construction of the flask means it is smaller and lighter than other thermos bottles. The bottle is made of food-safe, BPA- free materials, and does not contain pollutants such as phthalates or oestrogenic substances. The product details: Leakproof thermo bottle With screw cap Vacuum insulation Material: Stainless steel Free from pollutants Volume: 1.1 L