The Vac-u-lock Suction Cup plug is a great addition to anyone's toys collection. It is small, cheap and concealed easily. Good for not only harnesses, but for anywhere around the clock fun. This product is sure to make you, male or female, be satisfied with this 8 dollar (plus tax) toy.

It uses rubber which is probably what makes it cheap, as opposed to silicone. The feel of the toy is decent for its price; not too grainy, not too smooth. It is rather firm, hardly pliable, like silicone would be. Medium thickness, in my opinion. And yes, for the most part, it is waterproof.

It is designed similarly to butt-plugs, with a small top, expanding bigger to the bottom. There are two ridges which stimulate both the vaginal and rectal walls. The suction cup is nice, allowing you to stick it to any flat surface.

Small, less than 3 or so inches. Perfect for beginners or those with small orifices. Highly recommended unless you have loose holes (which I doubt).

Works well, very comfortable. Very easy to adjust and put on, or take off. Real easy to secure it onto the harness. Works well in many positions. Can be used on tables, chairs, walls, and more, thanks to the suction cup. Highly recommended.

Just wash it after use.

Rather large box, not concealed easily, but not humongous either. Recyclable.

Doubles as a butt-plug.