The mouthpiece should always be kept somewhere thrown in the bag as it does not fit in the case. The main disadvantage is that the sections do not fit together correctly, resulting in air leakage when using it. I do not recommend it.

The mouthpiece does not fit in the keychain case. This is a major drawback. However, the biggest disadvantage is that when it is placed in a tall glass with ice, it does not stay fully extended. The user should be able to "lock" the straw in the desired length somehow.