Tenga Onacup line is designed for discrete easy and mess free masturbation. Their disposable masturbators are the perfect toy to throw in a suitcase for a business trip or whenever you just don't want to hassle with messy lubes and washing out toys.
The Air Cushion Cup is by far the worst Tenga product. Measuring at only 5 inches in length this toy is just too small for the average guy. I found penetrating it to be difficult and once in I found it to be just too sort to get the real air cushion effect. At the mouth of the toy is a ring of foam which is supposed to create the air cushion effect. The foam had become dislodged in shipping and so it rattled around. Also i found the inner sleeve to be poorly attached so at least one attempt had me going in between the sleeve and the plastic case, not fun.
The toy makes an awful wheezing noise as you use it and it's default suction is fairly poor. I found that by using the suction control hole I was able to improve the toy's suction, but it did not completely eliminate the awful wheezing. Once I was properly inserted into the toy and the suction was right it did deliver an OK experience. Like the other toys in the line The Air Cushion Cup does have a nice ribbed interior sleeve. The lube was in perfect quantity and wasn't too sloppy or too dry.
The potential is there for this toy but it ultimately doesn't deliver, it's too short and the air cushion design is off the mark. I'd recommend skipping this one and getting the The Deep Throat Cup instead.