The phrase "little mouths" refers to small openings or holes that can be found in things, like the mouths of tiny animals or other objects. Full definition
This 100 % silicone pacifier is soft and flexible, making it perfect for little mouths that haven't developed any teeth yet. (abckidsinc.com)
The shallow spoon bowl is just small enough to fit in little mouths, yet deep enough to scoop plenty of food for a frustration free meal. (tinyfry.com)
These were wonderful to get into the tight spaces of little mouths without breaking and taste great. (businessinsider.com)