The Gemstone IBT bottle from SIGG is a stainless steel bottle with significant insulating properties. With the Gemstone IBT, no more worries about having a drink heated by the sun or cooled by a glacial mountain wind. Designed and optimized for the best possible grip, it will keep your drinks cold for 18 hours and your hot drinks warm for nearly 12 hours! Its stainless steel structure has been revised to be more shock-resistant and more practical to use thanks to a better grip.