Thermos vacuum insulation technology for maximum temperature retention, keeps hot for 7 hours or cold for 18. Durable stainless steel interior and exterior withstand daily use, resisting dents and dings. Cool to touch with hot liquids, sweat-proof with cold, ensuring a secure grip. Fits most vehicle cup holders for on-the-go convenience. Built-in tea hook holds tea bags and most leaf infusers for brewing loose leaf teas. Double wall interior with gun metal coloured stainless steel. Retro styling with maximum performance.