DENTIST ACCESSORY - Made of food grade silica gel, harmless, non toxic and eco friendly, flexible and durable for use.  This cheek retractor helps give you an unobstructed look of the oral cavity. COMFORTABLE TO USE - Effectively open the patient's mouth for inspection and dental surgery, convenient and practical. FUN ACCESSORY - Can support 134℃ high temperature cleaning, safe and hygienic, reliable, easy to clean and use. SUITABLE FOR HOME USE - Can be used repeatedly without causing discomfort to the mouth and lips, suitable for hospitals and dental clinics.  It is a great accessory to use along with home teeth whitening kits. TEETH WHITENING TREATMENT - 2pcs of mouth opener are available, meet your use needs.  Light weight and in small size, easy to store and carry.