have but wrong. This product still fits straight into the mouth of the neck of the bottle and sits there then also fixed. When upset or bottle not shake slipped the sipper and it is easy to remove and clean. So far, no smell or taste reception (have to say that so far only silent tap water was poured. Drinking is easier with great thirst, but can still something go wrong.
To downside: The price-performance ratio is not to wear, I find. But now is probably good politics of the company Nalgene, huge openings to produce and then you have to fork out if you will have a real Nalgene Sipper.
