I got the Tenga Deep Throat cup on a whim for my partner, I thought he would get a kick out of it.
In the past we have had great results with the Tenga Egg; twister, to be exact. Seeing how we have yet to own a permanent male masturbator, playing around with the disposables is a great way to explore and get a 'feel' for what might suit him best. In comes the Tenga Deep Throat US.

Basically what you have here, is a plastic cup that houses a TPE male masturbation sleeve, pre-lubed (I assume water based) and ready to go aka jack off in.

Upon first inspection you will see that the cup is large enough to fit even the most endowed. 7" long, 10" in circumference, 3 1/4" in diameter. It is fairly light weight, being roughly a half pound. The cup is void of any smell. The cup is sealed with with an extended label. Removing the label will expose the cap. Unscrew the cap and you will find a lubed plug seated in the insertion hole- remove this. Reaching inside the hole with your fingers you will find it is somewhat sloppy, Tenga filled the sleeve with an abundance of lube. You can feel the foam which is seated against the interior portion of the cup, then TPE is pulled taunt over that. There is a nice cushion to the TPE, due to the foam inserts. The TPE is extremely soft, almost gel like.
Here is the cup with all parts dissembled:

Here is how it is assembled inside of the cup:

As you see, there is a round foam bottom (with hole to access suction), the sleeve with foam square wrapped around, a round foam border to go around the top where the sleeve will roll over. Like this it is inserted into the cup. Upon first use you will remove the plug to access the hole.
There are various degrees of texture. From top to bottom: small nubs scattered about, 3 large rows of ribbing,large nubs with a small patch of small nubs on the side. The sleeve is also wider at the base, like a condom.
The textured sleeve inside out:

There is a foil sticker on the bottom of the cup that can be removed. Once removed you will have access with your finger to increase/decrease suction.

It is not marketed to be reusable, but with the use of a condom and some spare lube it could be used until you wear it out.

There are a variety of ways you can use the cup. You can use your hand to stroke in the cup or remove the sleeve all together, wedge it in the couch and fuck it, wedge it anywhere else and fuck it, or have someone assist you. You can travel with it, use it in the shower, use it in the bedroom, living room etc. The possibilities are endless, and considering how inconspicuous it looks, you are likely to get away with where ever you plan on using it; along with no evidence left behind. Lucky you!

Hilarious story, really.
So I break out the ol' deep throat from my partner. He had no idea that I had gotten a hold of one, let alone what it was at all. I explain what it is and get it ready for use. He is already a bit on edge, but is game. We after all have to test it, for science! Upon insertion and a quick stroking motion the cup queefs- loudly, sluuuurrrppp pffffttt sluuuurrrpppffffttttt. So, it's not silent. Go figure. Regardless we both crack up make a few jokes and keep on stroking. Eventually we get the tenga to the right suction setting (Thanks pointer finger!) and he is into it. But not enough to come. Thinking maybe I didn't have the right stokin' motion I let him have a hand at it. He tries and tries (Faster, slower, less suction, more suction, twist) but can't finish. He mentioned it felt like a loose sloppy blow job. The lube did last a while without drying out, which was about 10+ minutes. It can be resealed to be reused. But please don't unless you pull the TPE out and wash throughly, use hot soapy water, rinse, let dry inside out to decrease mildew or mold growth. Careful though, as just pulling on the cup made a small rip in the TPE, it seems the TPE sleeve is fragile no so roughhousing!
See small rip here on the left, as well as the entrance with the plug removed: