Most Mason jar lids are made of tinplated steel, which rusts quickly and easily. Here at the Mason Jar Lifestyle we always try to source the highest quality items, and this tooth brush lid is stainless steel!
Each of the round holes are 1″ in diameter.
They are made of 18/8 304 grade stainless steel, which is very resistant to corrosion and rust.
The video below is the regular mouth lid: