A bottle cap includes a reservoir; a screw cap; a magnetic lock comprising a magnetically actuated spring bolt on the reservoir, and a hole on the cap; a fingerprint scanner on the reservoir; and a battery powered controller on bottom of the reservoir for fingerprint identification and fingerprint storing. In response to placing a finger on the fingerprint scanner, the fingerprint scanner and the controller are activated, the fingerprint scanner captures a fingerprint from the finger and converts the fingerprint into digital signals which are sent to the controller, the controller compares the digital signals with the fingerprint record(s), if matching the bolt will be compressed to clear the hole with the clearing being kept for a time to disengage the cap from the reservoir, and thereafter the controller and the fingerprint scanner will be deactivated and the bolt will bounce back to its locked position.