Simple lid/cover for large glass/beermug/litres

I like drinking from these huge glasses, especially in summer cause I can put a lager ice cube in them. For the outdoor use, I printed a cover with a hole for a straw to protect me and the bees and bumblebees too.
The hole has a diameter of 11 mm, if you need other measurements - let me know.
Printed mine with 0.16mm layers.

No supports needed - printed nicely without adhesion too, but that may depend on multiple factors. 

As this is my first published creation there may be optimizations over time.

Happy summer.