Why does the Vita Herb Essence Cream tube become hollow after using only once?
The essence cream is product made by blending natural astaxanthin, vitamin C derivatives and natural tocopherol to control skin trouble occurred by harmful active oxygen. These oxidization-resistant materials become unstable when there is contact with air for a long time, thus a special tip (airless) is used to prevent contact with air. That is why air and the content comes out when it is used for the first time, but the air does not get in again to make vacuum in the interior of the tube, shaping it hollow. However, the original weight stays the same.
