Container closure indicator system

A container closure indicator system comprising:

• a cap flag and a flag screen,
• wherein the cap flag is located on a lower surface of a cap and extends downwards away from the lower surface and the flag screen is located on an outer surface of a container and adjacent a top end of the container and extends towards a bottom end of the container, and
• wherein the cap flag is configured for insertion behind the flag screen which is configured to occlude visibility of the cap flag till the cap is fully engaged with the container, wherein appearance of the cap flag behind the flag screen indicates that the container is closed by the cap,
• wherein the cap flag comprises a first region proximal to the lower surface of the cap and a second region distal to the lower surface of the cap, wherein the flag screen comprises a first region proximal to the top end and second region distal to the top end of the container,
• wherein a width of the second region of the cap flag is larger than a width of the second region of the flag screen and wherein the width of the second region of the cap flag is substantially same as the width of the first region of the flag screen such that when the cap is lowered towards the container but not fully engaged with the container, the second region of the cap flag is covered by the first region of the flag screen and when the cap is fully engaged with container, the second region of the cap flag is behind the second region of the flag screen and is at least partially visible.