Silencing Satchel Interactions

The description for the Silencing Satchel says that when a creature fails its save, “its mouth is sealed shut.” It then specifically states that the creature can't cast spells with Verbal components, consume potions, or take in food or drink.

Would you interpret “its mouth is sealed shut” to also prevent abilities that physically require the creature to open its mouth, particularly bite attacks or the use of breath Weapons? If a creature literally can't open its mouth, how could it bite or exhale a breath weapon through its mouth (without exploding like the Eborsisk in Willow)?

I'm curious what others' experience with the magic item has been at their tables.

Well, most things that can breathe through their mouths can also breathe through their noses, so I don't know that restricting breath weapons makes sense. But bite attacks, sure.