BABY PROOF YOUR TOILET: This toilet lock helps to keep your little one from accessing the toilet bowl out of curiosity. FLAT TOILET LID REQUIRED: A lip on the back of the lid will hinder the lock from adhering properly to your toilet. ADHESIVE GUIDELINES: The entire base of the toilet lock must make full contact with your toilet lid (Flat toilet lid is required). Failure to achieve this may result in the lock not adhering properly to your toilet, thus leading to unexpected functionality issues. DESIGNED FOR EASY ONE-HANDED USE: Boasting a universal design which fits most standard toilet, our toilet seat lock allows for convenient one-handed operation. Simply push and rotate to open, then push button to close! DEACTIVATE THE LOCK WHEN NEEDED: As opposed to other locks on the market which are difficult to open, the Wappa Baby toilet lock can be completely deactivated when the lock is not needed or when guests come for a visit.