The present disclosure relates to a container for the production of a foamed sclerosant composition, to kits and systems including such a container, to methods for preparing a foamed sclerosant composition using such containers, and to foamed sclerosant compositions obtainable by such methods. In an aspect, the container comprises a sealed sterile container body having one or more sidewalls extending between a top and a bottom of the container body and defining a foaming space. The container further comprises a mixing element disposed in the container body. The container contains a previously introduced gas and liquid sclerosant composition. The mixing element is configured to be operatively coupled with a rotatable actuator without the actuator reaching the foaming space. A medical professional may select the appropriate quantity and concentration for every treatment.
