Self Stering Coffee Mug

nsulated: double-wall vacuum insulation technology. Retains the temperature, flavor, freshness and nutritional value of the drink inside. Superior thermal retention to keep beverages hot or cold for up to 24 hours Durable: unbreakable, stainless-steel exterior and 18 8 304 interior. High quality materials: 100 percent rust-free, food-grade, hygienic, 100 percent bpa-free, non-toxic, non-leaching Worry-free: anti-drip lid with leak-proof silicon g