Glass Tongue Retainer by Glasswear Studios

Overall easy to hide

I ordered the usual size i use for tongue rings but this was a little too small. Still, I wear it without the o-ring and it’s just fine, other retainers i’ve had the o-ring would just pop off but this one doesn’t budge

Completely invisible

Even looking for it I can't see it. Glass is perfectly clear, no flaws. Rubber stopper is very secure - except when eating!! Almost swallowed mine on lunch break; I take it out to eat now and I have no problems whatsoever. Comes with a million of the little rubber backs so if you lose one it's fine.