Function: Made of food-grade silica gel.Non-toxic, harmless, healthy, environmentally friendly, without any odor.Wear resistance, drop resistance, high temperature resistance up to 220 degrees, bottom temperature resistance up to -30 degrees,The unique thermal insulation performance of silica gel, it won’t burn your hands when you just pour boiling water into it.Unbreakable, space saving, easy to clean, it is a good helper for you to travel and camp out and barbecue!After being folded, it will not be deformed in a crowded small bag. It is light and convenient. It can be used for travel, business trips, picnics and other activities