Shinefuture Cupping Therapy Set, Massage Cupping Therapy Sets,Silicone Cupping Therapy Sets ,Massager Tools for Joint Pain Relief, Self Silicone Massage Cups for Deep MuscleAs a renewal product of traditional medical jar, the Silicone Cupping Jar is made of silicone rubber with special additives. When pressed, the rubber jar changes its shape which leads to a negative pressure in the jar. When pressure is released,the deformed jar will regain its normal shape. The Elastic Cupping Jar would not scald the skin because it is not necessary to light a fire. It is easy to operate, safe to use and effective. Not only it can be