This is the grommet that works well! It is easy to get on the hole once you drill it. 3/8" grommet is perfect for the large Starbucks cold beverage straws.
We bought a case of mason jars, 24 oz. You could go smaller.
Drill holding top of lid. Place it on a flat piece of wood to prevent puckering and drill at a slow speed. We used a 1/2" bit.
Place the grommet in the hole.
These beauties are filled with margaritas!!