The TENGA Hard Edition Deep Throat Onacup has a gripping material that actually tightens as you use it. Add this effect to the sensational one-way valve that sucks you into heaven and you've got the best orgasm on the block. Oh yes!

With the adoption of the newly formulated HG-03 internal material, the Hard Edition allows for a tighter and firmer grip.

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 'slurping' sound and vibration to give you the feeling that you're enjoying a real deep throat experience.

Round head completely covers head of the penis.
Air hole you can cover or uncover to achieve your preferred suction level.
One-way valve to create vacuum state.
Combination of large and small nubs to generate complex stimuli.
Rippled tightening zone.
Grainy ripples for irresistible stimuli and a tightening sensation.
Silky ripples for a smooth, tightening sensation.
The lotion reservoir keeps the point of insertion in a wet state.

All TENGAs have lubrication inside. The lubrication consists of: purified water, glycerin, sodium polyacrylate, phenoxy ethanol, and paraben (allergy tested in Japan).