Some people end up twisting the gold cap first, and this is the WRONG thing to do. What you need to do is twist the bottom chamber clockwise. Give it a bit of muscle and you’ll see it budge and you’ll be able to rotate it to allow the two chambers to mix. The top chamber is where all of the alcohol is and so if you open the gold cap first, you’ll be getting 2.7 oz of liquor down the tubes. Make sure to twist the bottom first, then shake, then serve over ice!