The high-quality food grade Therma Handy vacuum insulated flask is now stronger than before. The lid is push-button locking and is made of BPA-Free. Nanobot Therma Handy can keep your drink cold for up to 24 hours and hot for up to 24 hours. Nanobot Therma Handy(thermos vacuum flask) is made in India vacuum flask bottle which is BPA- Free and made with the food grade 304 stainless steel.