The high-quality food-grade Vepo vacuum insulated flask is now stronger than before. The lid is made of food-grade stainless steel that can be opened with a simple rotation. Nanobot Vepo can keep your drink cold for up to 24 hours and hot for up to 18 hours. Nanobot Vepo is made in an India vacuum flask bottle which is BPA- Free and made with food-grade stainless steel.