VACUUM INSULATION TECHNOLOGY★ Double-walled vacuum insulating body and purely stretch-formed liner ensure that the tumbler is incredibly good at heat preservation. Every tumbler was tested to guarantee its high vacuum degree to keep your drinks cold for up to 12 hours and hot for up to 8 hours.
★18/8 STAINLESS STEEL & BPA FREE★The tumbler body is made of food grade 18/8 stainless steel. The exterior and liner, both 0.5mm thick, are sturdy and durable.
★NO SWEAT & HOLDER FRIENDLY★Due to its Vacuum insulated design, the tumbler never sweat. The upper body's large diameter allows easy cleaning; the lower body's small size makes the tumbler fit in standard sized cup holders