The Cello Flip Style Stainless Steel Insulated Flask is designed with Vacusteel Technology, combining steel and vacuum for superior insulation. This ensures your beverages remain hot or cold for extended periods. Made from 18/8 high-grade premium quality stainless steel, it features a 'Thermoseal' layer with copper coating for excellent heat retention. The flask includes a sturdy, leak-proof flip-top lid for hassle-free drinking and pouring, and the main lid doubles as a convenient cup. Its elegant silver color adds a touch of sophistication to your daily hydration routine.