Airpods Case Grip

AirPods themselves do not have a lipped or locking mechanism on the lid, the top portion of any snap-on AirPods case cannot naturally grip the lid on its own. For this reason, we include a double-sided adhesive strip with every AirPods case. The adhesive is designed to be applied inside the top lid of the INSÉRIF case, securing it firmly to the AirPods lid during everyday use, including when carrying them in a bag or pocket.

Please see the instruction how to attached the double sided adhesive strip on the Airpods product page
Black AirPods Personalized Case