When one of you is feeling disobedient come playtime, what's your/their move? There are literally millions of bondage options to choose from, but when you're looking for the silence and overall oral control that only a great gag can offer, we're recommending the Boundless Bar Gag from CalExotics.
Keeping back-talk at a minimum and biting, spitting and other mouthy shenanigans under control, the bit or bar style gag fits under the teeth and spreads the lips. Buckle up the black vegan leather band around their head after positioning the bit gag. The tighter the band, the tighter the gag against their lips, so there's some room for customization there.
As with any gag, please make sure to check in often to make sure your playmate can comfortably breathe and swallow.
* The Bar Gag is about 5" (12.7cm) long and .75" (1.9cm) in diameter. Strap adjusts to fit most.