Review on Thermo mug Contigo Byron, 0.47 l, red by Dorota Strzalkowska ᠌

Nowhere in the description I saw that the large valve just opens a small hole in the lid for drinking. That is, the place that you have to directly touch with your lips is not protected by anything. Well, the reliability of such a design seems to me personally short-lived. For some reason, the description of the product does not cover this moment in any way. The large valve acts as a lever and a plug is hidden inside the mug from a small hole. You can see it in the photo. Came in a plastic bag. There is not even a box with detailed instructions and details of the manufacturer. Only inside is a piece of paper in different languages ​​that is a mug with vacuum insulation.