of a small design feature that serves a practical purpose.
Bottle caps: Some packaging uses small openings or channels to manage airflow or liquid flow.
Measuring cups: Small spouts help direct liquid while pouring and reduce drips.
Kettle lids: Vents in certain designs allow steam to escape during heating.
Food containers: Some lids include vents to let steam escape during reheating, although only containers specifically designed for that use should be microwaved.
The details vary from product to product, but the general lesson is the same: a tiny opening may
