Sinclair institute select onyx - prostate massager by Topco Sales - review by Love Buzz

Add resource

For His (or her) Pleasure

Designed for P Spot pleasure this toy doesn't discriminate and effectively doubles as a G Spot massager. Created from beautiful black glass it is easy to sterilise to safely share the enjoyment of this toy with your partner. It's a perfect his and hers Pleasure spot massager.
-Suited to Both the P & G Spots alike
-High Quality
-100% Body Safe
-Rigid nature may not be suited to P Spot beginners
Rating by reviewer:
extremely useful review


Designed to be a prostate, or P Spot massager this sleek black glass wand also fits the bill as a great G Spot massager, making it a perfect his &/or hers solid massager. It's non porous nature make it easy to sterilise and its shape is easy to cover with a condom making it even more suitable as a his and hers kind of toy. Whether your together as a couple or flying solo the Onyx is suited to be played with where ever you choose as it's simply a glass wand, void of any mechanics making it (rather obviously)both silent and waterproof.

Although it is designed for anal use it's lack of flared base means that some care and caution is required, especially with slippery lubed up fingers. For me I found the length, pronounced curve and large bulbous end to be more than enough to prevent it from sliding all the way in, but I can see how others may possibly find themselves in trouble if they weren't careful.
  • Who / How / What
    [ ? ]
    Who might this product be best for? How is it best used? What are the best circumstances or situations for using this product?
    • Everyone
    • Solo
    • Couples
  • Where
    [ ? ]
    Where / what types of places can this product be used?
    • Anywhere
    • Campus/roommate living
    • Tub/shower/pool
  • Body / part areas
    [ ? ]
    What areas on the body can this product be used / what areas does it stimulate best?
    • Anal
    • G-spot
    • P-spot

Material / Texture

Crafted from smooth black cyberglass that has it's surface decorated with fine and understated light grey etched floral patterns the Select Onyx looks and feels like a piece of ceramic art. The etched patterns can't be felt during use but are very beautiful to the eye. It has the trademark heaviness of glass, but to me this one does feel more like it's a ceramic, perhaps this is due to it being black. I'm much more used to clear or lightly colored glass that has some opacity to it.

The surface is smooth, yet creates a slight drag when used anally without lube making lube a pretty big must! All lubricants, water, silicone and even oil are all compatible with the cyberglass. Personally I tend to stick to water based lubes as often more than one toy may get involved in play and you really don't want to be worried about what lube goes with which toy where!!

It is odourless and completely tasteless, its hard cyberglass material is incredibly rigid in nature with no give what so ever.(which may not be great for beginners as it can be rather unforgiving) Cyberglass is what Pyrex cookware is created from and is both completely body safe and safe as a sex toy material as it doesn't crack or chip easily. As it is also not porous it means that it can be sterilised to allow sharing between partners.
One of the amazing features of glass sex toys is their ability to absorb and hold temperature. The Select Black Onyx can be cooled or heated by simply immersing it in water until it is the desired temperature you wish to play with. Always check the temperature against the inside of your wrist, just as you would with a babies bottle before use to ensure you neither freeze nor burn yourself! It tends to be cool to the touch initially but can be quickly brought to body temperature by rubbing it between your hands, personally I quite like the cooler feel of glass initially, just letting it warm up to my body temperature during use.

Each end has a different size and shape, however the overall texture is the same smooth, sleek, polished glass finish.
    • Not porous at all
    • Rigid
    • Bumpy

Design / Shape / Size

Curved to ensure maximum stimulation of both the P & G spots this wand is approx 8" long and features two distinctly different shaped ends, each of which provides unique stimulating sensations. The smaller, almost finger like end has a few small ridges on the inner side of the curve, shaped to hone in on your pleasure spot and provide direct, deep massage, whilst the larger end features three large bulbs, all slightly different shaped to enhance your pleasure as they pass over and press against your pleasure zones..

The girth changes along the shaft from the thinnest 'finger' like end which has a girth of 3" to the three larger bulbs which are all approx 4" around, shrinking back to the 3" girth of the shaft in between. Although for the female anatomy I'd have to say it is almost perfectly sized, but I can see why some men new to prostate play may be a little frightened, especially of the larger bulbous end.

Whilst the curve is there for added pleasure it also makes it ergonomic for use. It fits well in the hand and is easy to grip onto whilst thrusting. The different shaped ends make it easy even with hands covered in lube. But care must be taken when used anally as there is no flared base to prevent it from going deeper than planned!

It is such a beautiful piece artistically, I would love to have it on display but think people would work out what it really is without too much trouble.
    • Ergonomic
    • Whimsical / artistic


Both the size and the curved shape of this toy make it perfect for finding and stimulating the P Spot, the G one too! However as we found it's rigidity isn't perfect for a beginner at anal play even if you are using the smaller finger like end.

Although my guy has experienced and enjoyed the sensation of a well lubed finger, the rigidity was what he wasn't comfortable with. With fingers, silicone and many other sex toy materials there is some flexibility and some 'give' allowing it to slightly mould to the shape of the body. With glass there is absolutely no give, no flexibility, nothing of the sought, making it not the most ideal material for beginners. However those experienced with anal play may just find, like I have that the hardness brings new sensations not felt with other materials.

For me though, the partner with both a bit of anal experience as well as a G Spot I absolutely love it, like all my other glass toys I enjoy the temperature play aspect of it as well, the feeling of something so much colder than flesh and so much harder than flesh is quite enjoyable. The large pronounced bulbs on the larger end are fantastic for massaging the G Spot, the firm, hard glass stimulates it very effectively, and the curve of the shaft helps to hone in on the G Spot with precision beyond any other sex toy I've ever experienced.

I feel that its ability to stimulate both the male and female pleasure spots make this an incredibly versatile toy, and I do love toys that can be used in more than one way.

Just remember to always use lots of lube for anal play, with this you can use any kind of lube you like as long as you use enough.
    • Easy to use
    • Lots of variety in function

Care and Maintenance

Super easy to clean with soap and warm water, I personally use a disinfecting soap but any type will do it, as will any of the toy cleaner products.

As with all toys made from glass it is simple to sanitise, you can simply boil it in a pot of water for over 3 minutes,or put it through the top shelf of dishwasher(on its own, without soap) or clean it down with a diluted bleach solution. Condoms can also be used if you wish to share it, or use it for both anal & vaginal sex.

As I've said this is a toy that works well for both anal and vaginal penetration, but if you wish to do so you must use care & caution (on top of the regular std/sti prevention).

Ignore what you may have seen in porn, nothing should ever go from ass to any other bodily orifice, no matter what the object is. If bacteria & such from the bowel were to enter the vagina it would greatly piss off the natural balance of things and you could end up with an awful infection. Therefore if you wish to use it for both vaginal & anal penetration you can use condoms to cover the toy, preventing any micro-organisms from migrating (use one condom for anal & another for vaginal), or you can sterilise it in between uses. It is because glass is so easy to sterilise that I think this is such a great toy for both male and female partners.

For more info on safe & hygienic Anal sex you can check out this post on Anal sex from Sexis or you can find all Sexis articles related to Anal sex here

As for storage, although you could store it within its clam shell packaging I prefer to keep all of my glass toys in their own padded storage bags to prevent them getting chipped or damaged. Sadly this one doesn't come with a padded bag, but many can be found here at Eden Fantasys or alternatively you can store it in a pair of socks.
    • Easy to clean
    • Easy to store
    • Easy to sterilise


It arrives in a sleek white box that has a definite minimalist feel. The front of the box has a curved shape cut out so that you can see the toy inside, where it is held in place by a plastic cradle.
Although it would be possible to store the toy in its packaging, for me it's far too fiddly so I've chosen to store this one inside a pair of socks until I can grab it it's own padded storage bag as I don't want it to crack or chip whilst I rumble through my toy box.

Included inside the package there is a small card that provides informative information regarding locating the P Spot and how to enjoy the toy.
    • Minimal
    • Very informative

Personal comments

Although this wasn't an initial hit with my guy (I'm sure when he's a little more experienced he will love it) It sure was with me. It's functional, pleasurable and beautiful to boot! Not to mention that it's versatile being suited to the pleasure points of both sexes.

I honestly cannot bring fault to this toy so feel that it does deserve a 5 star rating, the only negatives are that it isn't necessarily suited to beginners, which isn't the toys fault. Also it doesn't come with a protective storage pouch, but apart from that it's all awesome sauce! :)

For more information regarding the P-spot you may like to check out Prostate 101 from Sexis.


My guy is certainly a beginner when it comes to anal play, even after quite a bit of warm up play he found that even the slimmer end was too hard for him to enjoy. The size was ok but the lack of give and flexibility was an issue for him, which of course meant he wasn't into trying the larger bulbous end. He hopes that after a few small and flexible styled toys to be able to work up to it so not all hope is lost...

But for me, the anal loving thing that I am I found the smaller end very stimulating even as a warm up, and the larger end and it's bulging texture very satisfying as well. If that was all I ever got out of this toy I would be a happy woman... but that wasn't all...

After the proper cleansing and disinfecting I took it for a spin as a G Spot Massager (Never put something up your butt then up your vag without fully cleaning and sanitising it, if you are lazy like me using a condom on it for anal use works equally well) Oh Boy, This thing is very special indeed!

So Versatile, suited to both males & females, together or alone.. I'm in love with it!
    • Can be used anally or vaginnally
    • Not for begginners
Follow-up commentary
This has become my favourite go to G-Spotting toy. The over exaggerated curve along with the thick bulges along the larger end of the shaft has never had a problem honing in on my G-Spot, no matter how hard it tries to hide.

Whilst my guy hasn't wanted to re-visit this toy for P-Spot play it is a truly amazing toy that is easily in my top 5 toys.
This product was provided free of charge to the reviewer. This review is in compliance with the FTC guidelines.
Become a Reviewer. Get free toys. Enjoy Special Deals
This review was edited by
  • Kayla Kayla
  • Rank:
  • Edited reviews: 534
  • Kayla
    Great review. Congrats on your graduation!
  • Minxy
    I gotta get my greedy paws on one of these! great review!
  • Alegria
    Great review =)
  • Love Buzz
    Thanks guys, It really is a great high quality glass toy, Im in love with it
  • Airen Wolf
    Is this not the most beautiful, versatile piece of glass EVER? I love this thing
  • namelesschaos
    Great review the black glass on this sure looks lovely.
  • Love Buzz
    It is by far the most beautiful piece of glass I own, the light grey floral design that's lightly etched into is just gorgeous
  • Selective Sensualist
    Very thorough review! And I had no idea that there was a gray floral design etched onto it. That just make me want this more!
  • socceras
    great review it looks awesome
  • Midway through
    Great review!
  • Kim!
    Great review. This is so pretty and it's great to hear that you're still getting plenty of use out of it!
  • mikebooks
    Great review!! Thanks for this one
  • Upskirt
    Suuuuch a pretty toy! Thanks for the awesome review
  • Breas
    Excellent review, thank you!
No discussions yet.
Thank you for viewing Sinclair institute select onyx – prostate massager review page!