This plug is stainless steel with a largish bulb at one end which narrows considerably before flaring out into a flat oval ring. It's super easy to clean. I just use some toy cleaner and water, but if you intend to share it, I would recommend either boiling or the dishwasher so as to sanitize it.

Because the NJoy plugs are made from stainless steel they change temperature very quickly, making them good for temporary temperature play. I usually use mine starting from room temperature so it feels very cool going in but then adjusts itself to my body temperature, making it enjoyable for longer wearing periods. You could also make it warmer and use it that way, just be careful not to overheat it. It could easily get to a temperature to burn! No one wants to be burned on the inside. OUCH!

Since this plug is made of stainless steel it is not giving or flexible at all (though hopefully you didn't need me to tell you that!). I really enjoy the firmness, it makes it very easy to insert and makes its presence known with a firm pressure. Then there is the weight. This plug is hefty, it weighs 1 lb. so it definitely makes its presence felt when wearing it! I love it though! I can wear it for an extended period and feel absolutely no discomfort at all, just a comfortable fullness with some weight. I had no issues with this plug staying where I put it, though due to a curve in the plug I did need to ensure that the curve was facing a certain way to be fully enjoyable. Also I had no issues when sitting on a variety of surfaces. I did notice it more when sitting on a hard surface, but it was not uncomfortable---just noticeable. Though someone with a very small, unpadded butt might have a bit more discomfort on hard surfaces, it shouldn't cause any issues on soft padded surfaces. I also found it to be pleasant when used vaginally. Its shape makes it easy to stay in and not move around much, great for working out your kegels!

The box this plug comes in is beautiful! The outside of the box is black and is very discreet, all it has on it is the word NJoy. Inside is a Styrofoam form covered with pink satin to hold the toy in place. I use the box to store the plug when I'm not using it.