We had these fruit fly lids custom made for us to fit all 4.5″ Edris and Pro-Kal deli cups.
This style of insect lids vents the same as our screen but cost less.
Good for crickets, mealworms, stick insects, centipedes and many more.
The holes are not punched , they are molded into the lid so there are not any sharp edges.
Also available in a smaller hole for keeping flightless fruit flies.