About this item Milton Water Bottle has Double walled Vacuum Insulated technology that keeps beverages Hot or Cold for long hours VACUUM INSULATION | DOUBLE WALL: Double-wall vacuum insulation locks in temperature to keep beverages hot or cold for prolonged hours while preventing condensation on the outer surface. PREMIUM SS304 STAINLESS STEEL: Inner Outer high-quality SS304 stainless steel with copper coating for better temperature retention SAY GOODBYE TO "OOPS" MOMENTS : Our Milton hot and cold bottle has leak proof design that keeps your bag dry, whether you're on the move.