You guys did it again!!! Knocked it out of the park!!! Another Awesome idea!!! The cap part seems to slip out easily if it gets bumped, so I added a piece of scotch tape to keep the mouthpiece from falling out. It locks in, but slips out too easily, and it's the same on both the long and short mouthpiece. Other than that, I love it. Its easy to take anywhere. James Bond would have one.