The main body is made of food-grade silicone, created via compression molding. The opening features a self-closing spring mechanism—stainless steel encased in silicone. On the back, there is a belt clip made of ABS plastic with a metal spring. The silicone surface has a matte, non-slip finish and is easy to clean; the bag can be turned inside out for washing and is resistant to both high and low temperatures. The seams are heat-sealed silicone, ensuring no water leakage through needle holes.



