Insulated Tiffin Keeps Food Warm for 5 to 7 Hours. Smooth Twist and Lift Lid. Strong & Durable Outer Body. Effective Polyurethane Insulation. Hygienic Non-Magnetic Stainless Steel Inner Cello brings you Munch a hygienic way to enjoy your culinary preparations. The inner mirror finish liner parts are fabricated from non-magnetic stainless steel and double-walled sturdy storing pot is insulated with top quality P.U.F keeping hot content hot for longer. Made from virgin food grade materials to ensure healthy and happy meals for you.