Hmm, holding the mouth open seems like a great idea. Imagine the possibilities. Our Leather Ring Gag incorporates a solid steel ring that is wrapped with soft luxurious leather.
We have also incorporated our locking strap system to help everything stay put. Also features solid steel rivets and a matching keeper loop.  Shown with leather wrapped mouth ring and mouth straps made from Biothane.  Biothane is a synthetic strapping, it is stronger than leather and easier to sterilize. Shown with the  Small size ring.

Available in three ring sizes:  Will fit 14.5" - 20.5"circumferences
Small - 1.25" inside diameter with 1.75" outside
Medium - 1.5" inside diameter with 2" outside
Large - 1.75"inside diameter with 2.25" outside (only for experienced users)

Handmade by Sinvention in Canada
Includes a Lifetime Warranty*