We have ANTS! Little tiny ones that get into everything. When they crawl into a coffee mug thru the vent hole just one will ruin a whole cup. The vent hole is too big to plug with a toothpick but it's just right for a stream of ants. Drill the vent hole out to 5mm and print this contraption. The ring top lets you hang onto it better. PLA  is good enough but TPU would be better; 50% fill is recommended for PLA but not sure what to use with TPU. Tree support works fine.