With rising temperatures fast approaching it's good to keep your most valued drinks clear of any ingress of foreign matter, including insects.
To that end these covers are easy to install: just let the integrated edges seat on the edge of your glass and let gravity fix it in place.

They come in two sizes and also fit Swedish-made glasses.

As of now there are two language versions available, might add some later.

They are multi-color prints, but can easily be printend in PLA as well as PETG, both were succesfull in my case.
No special print settings are required, although you might iron the top-layers for extra smoothness.