Like getting your cock slowly milked by a black hole.
(Scatter your seed beyond the event horizon!)

Rank: A

• Very low stimulation
• Incredibly soft interior
• A slightly harder exterior shell (to hold its shape, to improve durability, and to be less oily in the hand)
• Hefty size

I've used the toy 4 times so far.

Hatopla product page with internal cam
OnahoDouga review with pictures, video, and cutaway
Purchased early 2026 from ToyDemon for $55.95

Interior

It's crazy soft. First time I touched the inside with my finger, I was taken aback. It's softer than the inside of your cheek, WAY softer.

The sensation: basically nothing. It's very low stimulation. That's the point of this hole (why it's called the ultra soft zero). There's no internal texture, just some large-scale waves, kinda, and a small nub-stinger area at the end.

When I first stuck my dick inside, it literally felt like there was more stimulation before, when my dick was outside of the hole, just from the ambient air lol. It felt like my dick had suddenly been engulfed by a black hole. Like it entered another dimension (the void dimension).

For the texture: I don't notice those large waves, but I imagine their presence is important anyway to help the material be at least a little bit squished/pressed into your dick, even when entering at a straight angle. And the nub-stinger at the end I normally can't feel, either, except for one time at the right angle with the right lube thickness — at that point, it felt very mildly stimulating, a bit like a uterus, popping in and out. But I couldn't replicate it. I haven't felt that end part of the toy again since lol.

The opening to the toy is a bit tighter with the harder exterior material, so if you nearly pull out, you can get some glans stimulation there.

But for the most part, the sensation feels almost like nothing at all. There are occasionally moments of tiny stimulation, sometimes I feel the jiggling of the material, but usually not. If I'm thrusting into it and not looking at it as I use it, I genuinely can't always tell if I'm actually going in/out of the toy, or if I'm even still hard.

However, stroking with it is enough to keep my dick hard and going.
So, I'd say it's a poor thrusting toy, and is much better suited for stroking.

I most like using it while sitting on my bum with my knees spread, feels like my cock is being slowly and softly milked. You can also grab the end cap and pull it up/down rather than holding the toy normally, which really makes it feel like cock milking, as you don't have any pressure from your grip.

Exterior

It's a big, chunky, floppy rectangular prism. Emphasis on big, it's 800g, real nice and hefty. I can really sink into this and let it fully engulf my cock, all the way down to the base. Still small enough for me to one hand stroke with it, though.

The exterior has a thin shell made from a slightly harder TPE material than the internals. Imagine a bottle full of jelly, kinda. It's not so much harder that the whole thing isn't still soft and jiggly — that external material is still softer than many toys. This shell material is practical:

• It lets the toy have more of a defined shape that you can hold, rather than being a totally floppy jelly blob ("bag of water", as I've heard an earlier single-layer version of this toy called)
• It keeps the super soft but consequentially super oily inner material from getting your hands oily
• It helps with the durability (the inner material breaks apart really easily, but so long as the exterior shell material holds, the toy will remain usable and enjoyable)

It's a smart choice and I like it.

I will say that after a few uses, the exterior did get more oily than out of the box, but it's still effective and less oily than it would be without the shell.

Actual Usage

This toy is about the destination, not the journey, imo.

The process of using it is comfortable, but not super pleasurable in and of itself.

In my experience, the faster an orgasm happens, the lower quality it typically is. The best orgasms are from a very slow and steady buildup, and that's what I use this toy for. I just stroke freely, relaxed, explicitly avoiding forcing myself to cum by tensing my legs/muscles or anything, and let the orgasm slowly build up to the point that I can't stop it from happening.

It works very well for that, gives me some super big orgasms, basically drains me. The process of getting there isn't pleasurable, but the orgasm itself is.

If that ultimately meant, like, 30-60min of meh sensation in exchange for 10-20 sec of amazing sensation, that probably wouldn't be worth it for me.

But the process of getting there isn't actually entirely dull, since:

• There are some brief moments of simulation, things you might not normally notice
• It feels nice to just be engulfed and have your dick smothered
• There can be more to it than just the onahole (you can imagine some fantasy, enjoy some erotic content, use other toys/stuff, etc.). It's not like you're restricted to using this and only this.

More importantly, I like the aftermath of big, slower orgasms like this. It's just so relaxing to cum buckets, then collapse and pass out. Somehow, it makes my pillows and blankets all feel so much softer and comforting. It prob arises from a combination of the big orgasm, plus some actual fatigue from the fact that I've been spending the last 30-60min stroking (and in a somewhat uncomfortable position, which happens to be my favorite position).

So, what I actually ultimately get from this toy is 30-60min of comfort, where I can get pleasure if I work for it using something else besides the onahole, followed by 10-20 sec of a big orgasm, and then 30-60 minutes of the best nap ever. That's worth it to me.

Scent

No scent. Even with my nose right up to it, it's very very faint.

Sound

Very quiet insertion-wise.

Lots of plap-plap sounds when stroking, due to the weight and the general increased speed of stroking that I'm more likely to do due to the low stimulation.

Durability

Out of the box: no exterior material imperfections (i.e. no microtears), but there were some odd permanent indentations in the form of various lines along the toy. I don't see how this could have occurred during shipping or storage, so I think it happened in manufacturing. It has no effect, just cosmetic. It's a giant rectangular blob anyway, not some sort of carefully sculpted torso shape, so it's fine.

Out of the box, still: there were minor imperfections near the entrance on the internals¹ These imperfections have not gotten worse so far.

After 2 uses: I looked at the inside and it was already tearing up. No longer smooth and shiny. Not entirely broken or anything, but still definitely torn in places.

However, I don't view it as a critical failure. As long as the exterior holds, the inside should be like a blob of contained jelly, and still be usable. So, the exterior durability is my primary concern (and so far, after 4 uses, it's been totally fine). It might be worth noting that these small tears will make the interior no longer smooth, and may actually add more stimulation to the toy.

Misc

Included lube packet was smaller than is typical (it's 5ml, most are 12–15ml)

Overall

Definitely a fun toy and relaxing toy. One I need to have some patience and an hour or two of free time for. I foresee myself continuing to use this in a regular rotation until it breaks.

I'm interested in trying more Hatopla products² now, and in trying more lower stimulation products in general. I probably wouldn't buy this one again, as I'd prefer something just a little more stimulating than this. Though I could also see it ultimately wind up the case that I explore a bunch of stuff, only to discover that this mega-low stimulation was the best after all. But for now, this is a Rank A toy.