Compact Design: Keychain bottle openers are designed to be small and lightweight, making them easy to carry around as part of your keychain. They are often made of metal or stainless steel, which is durable and resistant to rust.
Bottle-Opening Mechanism: These openers have a built-in mechanism, usually a lever or lip, that is designed to catch the cap of a bottle and pry it off with ease.
Attachment Point: Keychain bottle openers typically have a small hole, ring, or carabiner for attaching them to your keyring, making them convenient to carry with you at all times.