How can I create a "C-string" using a cup protector? (because it's underwear, maybe NSFW)

We would like to create our own "C-String". We already have a cup protector (athletes use this). Is there a way to make something so that the cup protector stays on despite gravity, or despite "size/volume changes"? (It's for a male).

The person wearing this will be lying down. Thus, whatever we make the "String" out of (the part that loops around to the buttucks area) has to be comfortable.

Perhaps there's a way to make use of the 3 breathing holes on the cup. ...

Picture of How can I create a
sort by: active | newest | oldest
Kiteman4 years ago
(Dang, I've just had a weird 5 minutes on google...)

The "C" will be a shaped plastic strip, covered in fabric. I guess you could cut a strip of thermo plastic & shape it with a heat gun?

The cup you have, though, will not cope with volume changes. You need a rigid frame that supports a more elastic fabric pouch, like a fishing net.

You can buy male versions, apparently...

(What a peculiar project)
makerobot (author)  Kiteman4 years ago
To add to my last comment...
You are right that there are male versions for sale. And they are made of an elastic fabric pouch (like regular clothing material). But as mentioned in our previous post, a cup protector just works fine. In fact, we prefer a hard material (the cup) over soft fabric pouches.

You said, the person wearing it would be lying down, this would mean there is no need for fancy attachments or strings.

If the touching surface of the cup is not made from soft fabric but plastic it would be quite easy to use glue for facial masks or hair pieces to hold the cup in place.

Those glues can be strong enough to prevent accidential loss of the cup as well as hiding those moments of pure male exitement we might want to prevent.

If the use of those glues is not an option I would consider the use soft silicone on the touching surfaces of the cup to assist in added friction.

To fix such a cup in place safely you would still need a three way fixing point.

Maybe those "invisible" clear straps used on fancy bra's are an option as they are also semi-flexible and prevent slipping.

makerobot (author)  Downunder35m3 years ago

Hi, DownUnder35. The touching surface is not made of fabric. It's made of some soft rubbery thing.

The glue you're talking about ... is it strong enough to stay on, but with the ability to come off when we want?

re: Silicone.

I don't think I understood what you wrote.

Would bra straps not be in the way? I want the legs and navel area (the area above the protector/shield) to be free of straps. What I like about the "C-string" design is that the thing goes down towards anus and up towards the person's posterior. This means the C-String is not in the way.

crapflinger3 years ago

i don't think there is an effective method of getting the proper "clamping force" in such a way that the cup would be uniformly compressed to the "area". you'll get quite a bit of clamping force at the bottom (if you design the wire/whatever in the same way as the pictures above) but not much elsewhere on the cup. maybe if the armature were pressing in the center of the cup on the front.

I'm sure this is going to get interesting but.....what exactly are you trying to achieve here? like, what's the desired outcome here? something that someone could wear around? you said the "subject" would be lying down...why does it need to be a c-string...wouldn't modifying a jock strap (athletic supporter....designed to hold a cup) be sufficient?

makerobot (author)  crapflinger3 years ago


You asked a very good question.

This project is for massage. The cup has advantages:

1. It keeps hidden from sight the private part.

2. It keeps hidden any size changes.

3. Because of the hard plastic shell, it prevents any, "Sorry for accidentally touching your private part" incidents (whether these are really accidents or not).

4. And if I can keep the shell clamped down, then the shell will me immovable (unlike if I use a blanket or drape).

The reason why I thought of using a "C-String" and not a jock strap is that a jock strap will get in the way of the massage.

I can't speak to the laws in whatever jurisdiction you operate in, but I know that where I'm at, if you're doing a massage in places that would be inhibited by a jockstrap or other thong type're going to find yourself on the wrong end of a fine from the local inspector's office.
makerobot (author)  crapflinger3 years ago

I answered your question, thinking that you would help me find a solution to my problem. The problem is not with laws.

well, the answer is, that if you're wanting to use a cup, as a "genital containment device" then one should logically use a jock strap (even if you have to modify it some to thin it out) as the cup containment device. any massage that I can think of that a jock strap would get in the way of should also be impeded by a cup covering the subject's genitals.

I would assume, though, that the straps would be obstructions in the same way as bra straps.

imagine yourself wearing a bra....then imagine where the straps go. for the most part, would you feel uncomfortable if someone, you don't really know and are paying, was to massage you in those uncomfortable would you be?

now imagine yourself wearing a jock strap...and then imagine the same thing.

the straps of a bra cover socially innocuous areas of the anatomy....not so much with a jock strap. and again, I did suggest modifying the jock strap to thin out the straps.

again, I don't know the rules in the OPs area, but I consulted a massage therapist friend about what is/isn't allowed in a licensed massage setting in TN and pretty much all of the buttocks are off limits. there is a "4 inch" rule about where your hands can be. you've got to be 4" from any body part considered genitalia. so the upper thighs are off the table so to speak.

I don't see a use for this apparatus in a normal massage since any of the areas that you're trying to leave open are generally not places you massage in a professional setting in the first place.

the other thing that comes up.....are you reusing the cup? is the person asked to bring their own cup? are you putting the cup in an autoclave? does anyone have any sound data on transferability of things like herpes through shared cup use? any data on what would be required to remove herpes from an athletic cup?

makerobot (author)  crapflinger3 years ago


I'm aware that your comment was a reply to Kiteman, but please let me reply. I was initially glad when you asked what the goal behind the project was. Because then, you and other people can think outside the box ("outside the cup" in this case, ha!)

You seem to have focused on legalities. I assure you, no law is being broken if something like this were constructed. I wish the discussion could go back to how to make something that meets the criteria listed.

the problem is that this seems to be a device that actually has little legitimate purpose.

you didn't answer the cleaning question either. if you're reusing a device that was recently in contact with someone's genitals you have to ensure that you're following medical guidelines for such things. my assumption is that you'd at least have to autoclave the thing since it's actually possibly in contact with bodily fluids and not just skin contact. I don't know how a cup would hold up to that...specifically the foam padding around the edge. even if the cup can be autoclaved, that still means you can't use thermoplastics as previously suggested. and I still don't know the effect of an autoclave on things like herpes virus etc...

then of course from a mechanical standpoint, if you form a piece of thermoplastic or metal or whatever into a's not going to be much of a one size fits all kind of thing. you'll obviously want this thing to be comfortable so it not fitting right would be a bad thing.

what's wrong with using a towel like absolutely every other massage therapist uses?

makerobot (author)  crapflinger3 years ago


How I wish we could focus on the problem I, as OP, want to solve, and not what you perceive as problems (legalities, hygiene).

I'm focusing on these items specifically because you don't seem to be. you seem to be looking to make a device for commercial use, not personal use. at which point you darned well better be thinking of hygiene and legalities unless you'd like your business shut down.

the hygiene of the device actually will decide how it's built in this case as you can't heat sterilize thermoplastics (because they're thermoplastics) and I don't know of that many commercially available cleaners that would be adequate for the process.

makerobot (author)  crapflinger3 years ago

CF, This is not for commercial use. These detours are tiring me.

makerobot (author) 3 years ago

OP here. We were thinking of making use of super-strong neodymium magnets. We will put three small magnets on the three holes of the cup protector. We would then place a larger magnet on the portion of the gluteal cleavage ("butt crack") directly opposite the cup protector.

Magnets that strong will, be heavy, and very dangerous. I used small neodymium magnets in a fake nose-piercing, and it hurt. A lot.

If you get body parts caught betwn magnets of the strength you require, it will be orders of magnitude more painful, you would not be able to prise the magnets apart, and you would, in all likelihood, lose the body parts concerned.

Could not say any better!
Strong magnets and body parts never mix.
I had these magnets shatter when friends ignored my warnings and let them bang together.
So far there have been no major injuries but one friend is only able to still see because he had his sunglasses on - one magnet shattered into three pieces, one made it half way through his glasses and actually still scratched his eye lid.
After that incedent I got rid of all my magnets that are bigger than 5x5mm.

makerobot (author) 4 years ago has a list of various thermoplastics. Maybe I should print that page out and bring it to the store.
makerobot (author)  Kiteman4 years ago

Thank you for your reply.

In some other places online, I'm reading that the "c" is wire,

Some reviews say that the grabbing/clamping power is good when newly purchased, but gets weaker the more you wear it.

We have a GPS mount in our car (RAM brand) . It's great because no matter how much you take it on and off the windshield, the sticking (suction) power will always be 100%. That got me thinking. We don't have to have an exact replica of the C-Cup. We could make one that improves upon the flaw (weaking clamping power over time). So now I'm wondering what we could use/make.

You said that the cup will not cope with volume changes. Not sure what makes you say that. We were experimenting with just the cup. And it does stay on him despite an increase in "blood flow". The secret was that we had to apply pressure on the cup (pressing towards the body). So what can we use to replace human hands?