Special valves create a virtual vacuum inside the cup, to deliver an amazing sucking sensation.And, the unique pinched-in shape helps to achieve an unparalleled tightness. These advanced features combine with an arousing sound and vibration to give you the feeling that youre enjoying a real deep throat experience.All TENGAs have lubrication inside. The lubrication consists of: purified water, glycerin, sodium polyacrylate, phenoxy ethanol, and paraben (allergy tested in Japan).Please note that this is product is designed to be used only once. Use condoms to extend usage. Brand: Tenga 

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