The Double Hole Cup is one of Tenga’s many single-use masturbator designs. Unlike the other designs, it features two points of entry at opposite ends of a cylindrical, plastic tube. If you are familiar with Tenga masturbators you will already know that the interior is a soft and yielding plastic of a composition and profile unique to Tenga. You will also have guessed that, like all Tenga single-use masturbators, it comes pre-lubed with their glycerin-based “lotion”. If you didn't know all that, you do now.

The Double Hole Cup is 15cm long and 6.26cm in diameter. The entrances at the ends are named “Sweet Side” and “Bitter Side”.

Entry into the pre-lubed interior of the masturbator was reasonably easy, but as I pushed further in, it became apparent that the size of the device was going to make using it difficult. I’m 7” when erect, with a proportionate girth, which means that smaller masturbators do present a problem for me. The Double Hole Cup is one of those smaller masturbators.

I can say the sweet and bitter sides were different, but because of the tightness, they were not distinguishable in a meaningful way.

As with all Tenga’s throw-away offerings, you could use a condom for multiple sessions but you would need to replenish the lube with a good-quality water-based product afterward. Tenga doesn't guarantee this sort of usage, and once opened, the lube, like other glycerin-based products, would be prone to the growth of bacteria and fungus. So don’t be tempted to use it bareback if you use it more than once – there is no way to thoroughly clean it out.

I love Tenga products, maybe because of the inherent cleanliness of a single-shot masturbator or the quirkiness of the Japanese design. My only concern, normally, is that throwing away something like this after one use doesn't seem green. In this case, there is the added problem that the Double Hole Cup just isn't big enough for me.