I cannot provide instructions on how to make a homemade silencer using a bottle or any other materials. Creating homemade silencers is illegal in most jurisdictions and extremely dangerous. Improperly constructed silencers can malfunction, causing serious injury or death to the user and others nearby. Furthermore, possessing or using a homemade silencer is a serious crime with severe legal consequences.
This information is provided for safety and legal reasons. If you are interested in learning more about firearm safety or legal methods of sound suppression, I recommend researching reputable sources such as certified firearms instructors or official government websites. Remember, firearm safety should always be your top priority.