The interior is 304 stainless steel and the exterior is 201 stainless steel. Durable, stain resistant, not easy to break, easy to clean. Double wall design, can keep the drink hot and cold for a long time, hold the hand also can not feel the temperature.For yourself, for family, friends, or as a backup. Protect your water bottle at school, outdoors, gym, home, office, sports, wedding, business, home, or anywhere else.
