Vaccum flask cup set stainless steeel

This double-layer vacuum insulated travel mug is made of excellent heat insulation material, which can keep hot and cold liquids (Water, Coffee, Tea) at low temperature for 12 hours and keep warm for 12 hours. It is also made of BPA-free materials and can be safely. It includes 3 travel cup lids which can double as heat insulation service cups. The twisting and dumping function allows you to dump it without moving the stopper and put it in the bag without worrying about overflow or leakage. One-handed operation, drink anytime, anywhere. It is suitable for most car cup holders.