The present invention relates to a container system having at least two containers, wherein the container system comprises a light or lighted member which is configured to provide information through the emission of light, wherein the container system is configured to provide or trigger the light or lighted member to provide the information through the emission of light when a step which is related to preparing a mixture of contents of the containers is conducted, in particular when the containers are separated from one another and/or when a fluidic connection is prepared between the containers.本發明係關於具有至少兩個容器之容器系統，其中該容器系統包含光或發光構件，其經構形以經由光之發射提供資訊，其中該容器系統經構形以在執行與製備該等容器之內容物之混合物相關之步驟時，特定而言在該等容器彼此分離時及/或在該等容器之間製備流體連接時，提供或觸發該光或發光構件以經由光之發射提供資訊。
