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Hello community,

Heres the deal. I'm watching a documentary about plastics... it details how only the specific plastic manufacturers know what exactly is in their raw products, that the companies eventually using the raw plastics to make things are kept in the dark, that questionable materials are likely being used to make plastics, that most plastics have been found to leach all sorts of toxic compounds, that many plastics leach endocrine disruptors, yada yada yada.... THEN I REALIZE THE CUP UP MY VAJAYJAY IS MADE OF PLASTIC, well thermoplastic elastomer at least, and isn't my spare silicone cup held together with plastic polymers?

I know manufacturers of plastics all stand by the safety of their products no matter what, and that companies using plastics do the same, but I don't trust them worth a lick...ALWAYS DO YOUR OWN RESEARCH I stopped using plastic water bottles, plastic food containers, and plastic-lined canned foods ages ago due to personal concerns I had about phthalates and BPA. These concerns turned out to be well founded, as tons of articles are being published about their dangers today.

So what I want to know is: What is in our menstrual cups? What has been done to ensure that toxic endocrine disruptors are not leaching right into our reproductive organs?

If anyone has any literature to site about thermoplastic elastomers, or medical grade silicone (I know it sounds safe, but you never know) or any other materials cup companies will own up to using PLEASE SHARE. If any cup companies themselves are willing to pipe in that would be greatly appreciated as well!

Current Mood: curiouscurious
Arrow_Bright: Avonlea in Winterarrow_bright on April 3rd, 2012 02:32 am (UTC)
I don't know much about TPE safety, but from what I've read, silicone is inert, especially medical grade. I don't have any studies to link to right now because I have too much homework, but Debra of Debraslist.com (a list of healthy and environmentally friendly stores/web sites) and Greenlivingqa.com (where you can ask her questions about various green/safety issues, and probably also ask for her sources) highly recommends it as a safe synthetic. I do remember some of my own research on silicone, and the only real safety issues that came up were with liquid silicone (specifically in regards to implants).

"Polymer" refers to the shape/size of the molecule. Plastic and silicone (as well as natural rubber and cellulose, among others) are types of polymers because of their molecular structure, but that's it. There's no plastic in silicone (unless it's being used as a filler [if that's possible?], which wouldn't be the case for medical grade, anyway). It's confusing because sometimes people use the word "polymers" to refer only to plastics.
Tessgryphonwing on April 3rd, 2012 04:35 am (UTC)
Yeah, you can have organic polymers too. Some starches polymerize just fine, and cellophane is a cellulose-based polymer. It just means the molecules link up in long chains.
rachaelhubbard on April 3rd, 2012 05:17 am (UTC)
I love that you folks know about chemistry. <3.
tinkerandcrabtinkerandcrab on April 3rd, 2012 11:07 am (UTC)
Love your user pic! :^)
rachaelhubbard on April 3rd, 2012 04:00 pm (UTC)
Why thank you :)
okwaho_okaraokwaho_okara on April 3rd, 2012 11:59 pm (UTC)
I like it too :)
rachaelhubbard on April 4th, 2012 01:38 am (UTC)
Awww, shucks! :)
galenbrethilgalenbrethil on April 3rd, 2012 05:26 am (UTC)
The reason a lot of water containers, etc. have chemicals like BPA in them is that the require a 'plasticizing agent' outside of their standard chemical structure or they are too rigid (the is definitely true for polycarbonate and PVC). Of course this can result in a slow leak of said chemical because it isn't tightly bound. (this is the same reason that new cars have a 'new car smell'). After being used for awhile practically nothing else comes out... hence why you lose the new car smell. I believe silicon polymers don't require a plasticizing agent though (the internal chemical bonds are very strong - hard to break), so no need to worry.

Also the research on BPA generally indicates it's safe in low concentrations (the statistics showing it increases risk of anything at the levels leaked by water bottles are basically negligible) - mostly it just got hyped up by the media. 'BPA-free' water bottles basically have to use a different plasticizing agent, I'm not sure what they've replaced it with but it's probably something that less research has been done on than BPA. Anyway, if you don't use near-boiling water (high temperature increases solubility, so more BPA comes out... very little comes out in cold water) in those containers you should be fine.
m03m on April 3rd, 2012 07:24 am (UTC)
Here's the information Meluna gives about the thermoplastic elastomer they use for their cups.
Instead SoftcupInstead Softcup on April 4th, 2012 12:15 am (UTC)
Softcup materials
Thank you for giving us a chance to respond to your inquiry. Softcup is made of medical grade materials that are considered safe for use in the medical industry, which employs a high safety standard. Softcup underwent extensive toxin safety tests before it was released on the market in 1996, and results of this testing were found to be acceptable by the FDA. None of the material components used to make Softcup has been identified as a source of any toxicity. Of the ingredients you identified as being potentially toxic, none are present in Softcup. Furthermore, over 200 million Softcups have been sold with no toxicity issues ever being identified.

You can find more information about the safety of Softcup on our website at: http://www.softcup.com/content/health-info

Furthermore, to read information about our premarket clinical testing, visit http://online.liebertpub.com/doi/full/10.1089/jwh.2009.1929

The link regarding MeLuna materials contains some good information on plastic elastomer. It is in German, but if you copy and paste the link in Google, you can select "Translate this site" to read the information.

If you or anyone else has questions about Softcup, feel free to contact us at customer.service@softcup.com.
liquify420liquify420 on March 21st, 2016 02:09 am (UTC)
I mentioned this when MeLuna launched 15 years ago, and people totally attacked me over it.