The best ball gag

[Pseudo_Sissy]

softened TPU

Aha, yes, that might be it!
Anyway, if it feels good in the mouth, it should be fine, no?

There were happy users earlier in this thread, but to me personally, the material doesn't feel good. It's soft and squeeky, kind of chewing-gum/rubber band-like, and as I said it gives me the sensation that it's gonna give way to the teeth. It had the leftover slivers on seam lines that were falling off, too.

That would be fine, overlookable if the actual thing worked well. To me it doesn't.

There's the big aspect of material chemical safety. You don't know what softening additives it has (could be the infamous phthalates), or even what kind of plastic it is. Lifetimes of text have been written about safety of sex toy materials.

[Pseudo_Sissy]

Just for fun, here is what it looked like when I tried to boil it like you would with actual silicone. I knew what would happen, I wanted to record it on video for Aliexpress dispute.

And I got full refund with no trouble. I used the photo and full length of the video of me boiling it.

[Like Ra]

Here is another shop with few bucks off: https://s.click.aliexpress.com/e/_DDsv1R7

Edit:

And another one even cheaper: https://s.click.aliexpress.com/e/_DBh4cPb

So, I bought both versions of this gag: ball-gag-look with a strap and the invisible/internal one.

While both are extremely comfortable and effective from the muffling point of view, both can be easily spit out. It does not matter how tight the strap is buckled - it will drop to the neck at the narrowest place, and all you need to do is "nod", open mouth, and push just a bit with your tongue. Plop!