Review on Air Tag Holder For Dog Collar(2 Pack), Silicone Pet Collar Case For Apple Air Tags, Anti-Lost Air Tag Case Pet Loop Holder Compatible With Dog Collars & Backpack Accessories (Glow In Dark) by Ruth Reiners

The silicon holder holds the tag tightly enough that it cannot fall out. However, the holder is entirely silicone so the loop for attaching to a collar has the potential to get broken if your dog scratches too much. Also, the loop is sized for a 1" wide collar that is about 1/8" thick. It can stretch a bit for a thicker collar, but not much. The pair I got was black/dark blue, both of which goes well with a dark colored collar.