This is a simple lid for an IKEA Droppar glass storage container. My original lid broke, so I designed this one. The TPU lip seals the container tightly. If you have a multi-material printer, print the outer part in PETG and only the seal in TPU. If not, printing everything in TPU should work as well.

I used 0.4mm nozzle diameter, 0.2mm layer height and 40% infill, no brim, no supports.